Time Eater

The Time Eater is one of three Act 3 boss enemies with 456/480 HP. Its defining mechanic is Time Warp: every time the player plays 12 cards total during the fight, the Time Eater immediately ends the player's turn and heals itself for 2% of its max HP. It also uses Reverberate (repeats your last card's effect against you) and has a persistent attack pattern of multi-hit damage.

The Time Eater specifically counters Shiv and high-card-count Silent builds, as those decks play many cards per turn and quickly trigger Time Warp. Card-efficient decks that play fewer but more impactful cards per turn handle it better. Managing card plays to avoid triggering Time Warp at inopportune moments — such as before you have dealt your damage for the turn — is crucial. Watcher builds focusing on Wrath stance single big attacks are among the best counters to Time Eater.