Donu and Deca

Donu and Deca are one of three Act 3 boss encounters, featuring two separate enemies each with 250 HP who must both be killed to win. Donu uses Ring of Fire (buffs all enemies with 3 Strength each turn) and Circles of Power (applies a powerful buff). Deca uses Square of Protection (gains 25 Block and gives 2 Dazed cards to the player) and Beam (28-33 damage).

Donu and Deca is a race against Donu's Strength stacking, which makes Deca increasingly dangerous over time. Killing Donu first is typically preferred to stop the Strength buff, though Deca's Block can make it evasive. Strong AoE or multi-target strategies can damage both simultaneously. The Dazed cards from Deca's Square of Protection accumulate over a long fight, adding pollution pressure. Burst damage to end the fight quickly is the strongest approach.