The Infinity Arena is an endgame challenge located in the Keepers' Tower. It is gated until the player reaches Keeper Seeker. The player faces increasingly difficult teams, ending after one loss.
Combat Mechanics[]
Team and Battle Structure[]
Infinity Arena pits the player against teams of random Monsters. These are 3v3 battles similar to a wild encounter. These Monsters can be any species, except for the Spectral Familiars.
At the start of each battle, the player is given the opportunity to choose 3 Monsters from their current team of 6. The player's Keeper Rank determines the level of the first opposing team. After each win, the level is increased depending on the number of stars achieved on the previous battle. Rewards are generated in the background. A new team of 3 random Monsters is generated at this level. The player is then given the opportunity to select 3 new friendly Monsters from their current party.
Stars  1  2  3  4  5  6 

Level Increase  2  3  4  5  7  10 
 Level 40 onwards, opposing Monster's Health scales less.
 Level 70 onwards, one of the opposing Monsters will be shifted.
 Level 100 onwards, opposing Monsters will start to use their Ultimate skills.
 Level 130 onwards, two of the opposing Monsters will be shifted.
 Level 160 onwards, all of the opposing Monsters will be shifted.
 On lower levels, opposing Monsters are less resistant to Poison, but become more resistant to it as well as Burn and Congeal with higher levels.
 The scaling used is calculated as follows:
 Poison damage is modified and decreases on higher levels, capped at 0.3.
 Burn damage is modified to 1.1 but decreases on higher levels, capped at 0.35.
 Congeal damage is modified to 1.1 but decreases on higher levels, capped at 0.85.
Consumables[]
Consumables can be used and are refunded at the end of the run.
Revive Limit[]
The player is limited to using up to 5 revive actions per round. This includes using items (Phoenix Tear and Phoenix Serum), as well as using active skills (Revive and Gift of Life). Note that autorevive passive skills (Phoenix Affinity and Charged Rebirth) do not count toward this revive limit.
Infinity[]
At the start of their turn, all Monsters (allies and opponents) receive one stack of Infinity, which increases damage dealt by 25%. If a Monster is revived after being knocked out, it will regain the current Infinity stack count.
Rewards[]
Rewards are given to the player after completing or dropping out of an arena run. Some rewards are unlocked once you reached a certain Keeper Rank. You can get up to 4 rare items and 4 common items per run (maximum of 8 unique rewards). Which item you get is totally random, and not based on the level your run ends. Any consumables that were used during the run are also refunded.
Arena Coupons and Reward Boxes are rare items that can be obtained from Infinity Arena. An Arena Coupon is rewarded every 12 levels, which can be used to buy items from the nearby merchant. A random Reward Box is rewarded every 6 levels, and after reaching 60 levels above the start level, it is rewarded every 4 levels. All other items are common items and can be obtained in high quantities.
Keeper Rank[]
The player's Keeper Rank determines the level of the first team the player fights against as well as unlocks rewards and higher level Reward Boxes.
Rank  Start level  Common  Rare 

Keeper Seeker  Lvl 15  Skill Resetter, Monster Bell, Crystal Shard, Level Badge, Phoenix Tear, Potion, Smoke Bomb, Red Gem, Blue Gem, Green Gem, Copper, Cotton  Arena Coupon, Craft Box, Reward Box lvl 1 
Keeper Lancer  Lvl 15  Antidote, Bronze, Iron, Wool  
Keeper Ranger  Lvl 20  Mass Potion, Combo Potion, Crimson Gem, Azure Gem, Verdant Gem, Leather  Reward Box lvl 2 
Keeper Knight  Lvl 25  ?  
Keeper Champion  Lvl 30  Silver, Steel, Silk, Peanut, Banana, Orange, Raspberry  Reward Box lvl 3 
Keeper Dragoon  Lvl 35  ?  Reward Box lvl 4* 
Keeper Master  Lvl 40  ?  Reward Box lvl 5, Reward Box X 
* Requires unlocking the Abandoned Tower.
Arena Coupon Trader[]
Unlike other merchants, the Arena Coupon Trader sells items in exchange for Arena Coupons. More items become available as the player increases their Keeper Rank. He sells all unique weapons and accessories, as well as Shift, Switch and Clear Stones. He also sells all 39 Relics if Relics of Chaos is active after the player reaches Keeper Master.
Click to show all items.
Item  Cost
{{#if:Shift Stone 

Shift Stone  2A
{{#if:Switch Stone 
Switch Stone  1A
{{#if:Clear Stone 
Clear Stone  1A
{{#if:Abyssal Sword 
Abyssal Sword  4A
{{#if:Hexing Rod 
Hexing Rod  5A
{{#if:Restoring Wand 
Restoring Wand  5A
{{#if:Thorn Tendril 
Thorn Tendril  4A
{{#if:Trident 
Trident  4A
{{#if:Buckler 
Buckler  3A
{{#if:Hourglass 
Hourglass  3A
{{#if:Spark 
Spark  3A
{{#if:Tarot Card 
Tarot Card  3A
{{#if:Fan 
Fan  4A
{{#if:Mandolin 
Mandolin  4A
{{#if:Purifying Mace 
Purifying Mace  5A
{{#if:Swallow 
Swallow  4A
{{#if:Torch 
Torch  5A
{{#if:Warhorn 
Warhorn  4A
{{#if:Flute 
Flute  3A
{{#if:Lucky Clover 
Lucky Clover  3A
{{#if:Mage Flask 
Mage Flask  4A
{{#if:Tambourine 
Tambourine  3A
{{#if:Warrior Flask 
Warrior Flask  4A
{{#if:Ancestral Medal 
Ancestral Medal  5A
{{#if:Infinity Flame 
Infinity Flame  10A
{{#if:Scythe 
Scythe  5A
{{#if:Totem 
Totem  3A
{{#if:Blood Vessel 
Blood Vessel  3A
{{#if:Cauldron 
Cauldron  4A
{{#if:Lightning Sphere 
Lightning Sphere  4A
{{#if:Slime Skin 
Slime Skin  4A
{{#if:Dumbbell 
Dumbbell  3A
{{#if:Bead Chain 
Bead Chain  3A
{{#if:Hammer 
Hammer  3A
{{#if:Summoned Sword 
Summoned Sword  4A
{{#if:Charging Sphere 
Charging Sphere  3A
{{#if:Omni Ring 
Omni Ring  4A
{{#if:Shield Generator 
Shield Generator  3A
{{#if:Thermal Reactor 
Thermal Reactor  4A
{{#if:Fishing Rod 
Fishing Rod  3A
{{#if:Moon Sword 
Moon Sword  3A
{{#if:Pirate Hook 
Pirate Hook  4A
{{#if:Gray Pearl 
Gray Pearl  5A
{{#if:Frozen Tear 
Frozen Tear  2A
{{#if:Bow 
Bow  4A
{{#if:Heavy Mace 
Heavy Mace  4A
{{#if:Poisoned Dart 
Poisoned Dart  4A
{{#if:Ornate Pipe 
Ornate Pipe  3A
{{#if:Fin 
Fin  3A
{{#if:Crown 
Crown  2A
{{#if:Sun Pendant 
Sun Pendant  3A
{{#if:Scepter 
Scepter  3A
{{#if:Harp 
Harp  3A
{{#if:Katana 
Katana  5A
{{#if:Large Shield 
Large Shield  3A
{{#if:Medallion 
Medallion  2A
{{#if:Pandora's Box 
Pandora's Box  2A
{{#if:Ocarina 
Ocarina  2A
{{#if:Brooch 
Brooch  2A
{{#if:Drum 
Drum  2A

Relics are only available if Relics of Chaos is active.
Item  Cost
{{#if:Ancient Clock 

Ancient Clock  2A
{{#if:Arch Bow 
Arch Bow  2A
{{#if:Assisting Bow 
Assisting Bow  2A
{{#if:Cursed Drum 
Cursed Drum  2A
{{#if:Devonian Medal 
Devonian Medal  2A
{{#if:Dragon Saddle 
Dragon Saddle  2A
{{#if:Droid Sphere 
Droid Sphere  2A
{{#if:Dwarven Crown 
Dwarven Crown  2A
{{#if:Earth Symbol 
Earth Symbol  2A
{{#if:Eclipse Sword 
Eclipse Sword  2A
{{#if:Fire Symbol 
Fire Symbol  2A
{{#if:Fishing Pole 
Fishing Pole  2A
{{#if:Goblin Garment 
Goblin Garment  2A
{{#if:Gold Feather 
Gold Feather  2A
{{#if:Grey Stone 
Grey Stone  2A
{{#if:Grim Ripper 
Grim Ripper  2A
{{#if:Heavy Greaves 
Heavy Greaves  2A
{{#if:Holy Necklace 
Holy Necklace  2A
{{#if:Infinity Blaze 
Infinity Blaze  2A
{{#if:Lion Fang 
Lion Fang  2A
{{#if:Moon Ring 
Moon Ring  2A
{{#if:Nimble Wings 
Nimble Wings  2A
{{#if:Omni Sword 
Omni Sword  2A
{{#if:One Punch Fist 
One Punch Fist  2A
{{#if:Pandora's Chest 
Pandora's Chest  2A
{{#if:Projectile Sphere 
Projectile Sphere  2A
{{#if:Pure Leaf 
Pure Leaf  2A
{{#if:Reptilian Idol 
Reptilian Idol  2A
{{#if:Sharp Fin 
Sharp Fin  2A
{{#if:Slimy Ball 
Slimy Ball  2A
{{#if:Staff of Doom 
Staff of Doom  2A
{{#if:Static Loop 
Static Loop  2A
{{#if:Sun Ring 
Sun Ring  2A
{{#if:Tiny Pin 
Tiny Pin  2A
{{#if:Toxic Pot 
Toxic Pot  2A
{{#if:Warlock Hat 
Warlock Hat  2A
{{#if:Water Symbol 
Water Symbol  2A
{{#if:Wind Symbol 
Wind Symbol  2A
{{#if:Spirit Blaze 
Spirit Blaze  2A

Item  Cost
{{#if:Katana 

Katana  5A
{{#if:Large Shield 
Large Shield  3A
{{#if:Medallion 
Medallion  2A
{{#if:Pandora's Box 
Pandora's Box  2A
{{#if:Ocarina 
Ocarina  2A
{{#if:Brooch 
Brooch  2A
{{#if:Drum 
Drum  2A

Item  Cost
{{#if:Fin 

Fin  3A
{{#if:Crown 
Crown  2A
{{#if:Sun Pendant 
Sun Pendant  3A
{{#if:Scepter 
Scepter  3A
{{#if:Harp 
Harp  3A

Item  Cost
{{#if:Bow 

Bow  4A
{{#if:Heavy Mace 
Heavy Mace  4A
{{#if:Poisoned Dart 
Poisoned Dart  4A
{{#if:Ornate Pipe 
Ornate Pipe  3A

Item  Cost
{{#if:Fishing Rod 

Fishing Rod  3A
{{#if:Moon Sword 
Moon Sword  3A
{{#if:Pirate Hook 
Pirate Hook  4A
{{#if:Gray Pearl 
Gray Pearl  5A
{{#if:Frozen Tear 
Frozen Tear  2A

Item  Cost
{{#if:Hammer 

Hammer  3A
{{#if:Summoned Sword 
Summoned Sword  4A
{{#if:Charging Sphere 
Charging Sphere  3A
{{#if:Omni Ring 
Omni Ring  4A
{{#if:Shield Generator 
Shield Generator  3A
{{#if:Thermal Reactor 
Thermal Reactor  4A

Item  Cost
{{#if:Scythe 

Scythe  5A
{{#if:Totem 
Totem  3A
{{#if:Blood Vessel 
Blood Vessel  3A
{{#if:Cauldron 
Cauldron  4A
{{#if:Lightning Sphere 
Lightning Sphere  4A
{{#if:Slime Skin 
Slime Skin  4A
{{#if:Dumbbell 
Dumbbell  3A
{{#if:Bead Chain 
Bead Chain  3A

Item  Cost
{{#if:Shift Stone 

Shift Stone  2A
{{#if:Switch Stone 
Switch Stone  1A
{{#if:Clear Stone 
Clear Stone  1A
{{#if:Abyssal Sword 
Abyssal Sword  4A
{{#if:Hexing Rod 
Hexing Rod  5A
{{#if:Restoring Wand 
Restoring Wand  5A
{{#if:Thorn Tendril 
Thorn Tendril  4A
{{#if:Trident 
Trident  4A
{{#if:Buckler 
Buckler  3A
{{#if:Hourglass 
Hourglass  3A
{{#if:Spark 
Spark  3A
{{#if:Tarot Card 
Tarot Card  3A
{{#if:Fan 
Fan  4A
{{#if:Mandolin 
Mandolin  4A
{{#if:Purifying Mace 
Purifying Mace  5A
{{#if:Swallow 
Swallow  4A
{{#if:Torch 
Torch  5A
{{#if:Warhorn 
Warhorn  4A
{{#if:Flute 
Flute  3A
{{#if:Lucky Clover 
Lucky Clover  3A
{{#if:Mage Flask 
Mage Flask  4A
{{#if:Tambourine 
Tambourine  3A
{{#if:Warrior Flask 
Warrior Flask  4A
{{#if:Ancestral Medal 
Ancestral Medal  5A
{{#if:Infinity Flame 
Infinity Flame  10A

Relics are only available if Relics of Chaos is active.
Item  Cost
{{#if:Ancient Clock 

Ancient Clock  2A
{{#if:Arch Bow 
Arch Bow  2A
{{#if:Assisting Bow 
Assisting Bow  2A
{{#if:Cursed Drum 
Cursed Drum  2A
{{#if:Devonian Medal 
Devonian Medal  2A
{{#if:Dragon Saddle 
Dragon Saddle  2A
{{#if:Droid Sphere 
Droid Sphere  2A
{{#if:Dwarven Crown 
Dwarven Crown  2A
{{#if:Earth Symbol 
Earth Symbol  2A
{{#if:Eclipse Sword 
Eclipse Sword  2A
{{#if:Fire Symbol 
Fire Symbol  2A
{{#if:Fishing Pole 
Fishing Pole  2A
{{#if:Goblin Garment 
Goblin Garment  2A
{{#if:Gold Feather 
Gold Feather  2A
{{#if:Grey Stone 
Grey Stone  2A
{{#if:Grim Ripper 
Grim Ripper  2A
{{#if:Heavy Greaves 
Heavy Greaves  2A
{{#if:Holy Necklace 
Holy Necklace  2A
{{#if:Infinity Blaze 
Infinity Blaze  2A
{{#if:Lion Fang 
Lion Fang  2A
{{#if:Moon Ring 
Moon Ring  2A
{{#if:Nimble Wings 
Nimble Wings  2A
{{#if:Omni Sword 
Omni Sword  2A
{{#if:One Punch Fist 
One Punch Fist  2A
{{#if:Pandora's Chest 
Pandora's Chest  2A
{{#if:Projectile Sphere 
Projectile Sphere  2A
{{#if:Pure Leaf 
Pure Leaf  2A
{{#if:Reptilian Idol 
Reptilian Idol  2A
{{#if:Sharp Fin 
Sharp Fin  2A
{{#if:Slimy Ball 
Slimy Ball  2A
{{#if:Staff of Doom 
Staff of Doom  2A
{{#if:Static Loop 
Static Loop  2A
{{#if:Sun Ring 
Sun Ring  2A
{{#if:Tiny Pin 
Tiny Pin  2A
{{#if:Toxic Pot 
Toxic Pot  2A
{{#if:Warlock Hat 
Warlock Hat  2A
{{#if:Water Symbol 
Water Symbol  2A
{{#if:Wind Symbol 
Wind Symbol  2A
{{#if:Spirit Blaze 
Spirit Blaze  2A
