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The arena is a building within the Graveyard, where minions can be assigned to train, improving their effectiveness in combat. Each minion assigned to the Arena will receive +10 experience points and 45% of the experience from the current level after a victory, except for quest battles. The amount of experience given decreases with increasing difficulty levels with 10 + 45% being the amount for the Cakewalk difficulty.

The Arena can be unlocked by sacrificing a Skeleton and 25 Diggers' Souls. Extra minion slots can be unlocked by sacrificing a Bride of Iratus, a Head Hunter, and a Fallen Dhampir. You can sacrifice these minions in any order, and it will cost 40 Souls for the second upgrade, 60 for the third, and 80 for the fourth and final upgrade.

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