Slay the Spire 2 Wiki

Enemy

Byrdonis

elite

Byrdonis is an elite enemy encountered in the Overgrowth during Act 1a. This large, bird-like creature is one of the first serious combat challenges players face and serves as a gear check for early-game deck quality. Byrdonis hits hard and has enough HP to survive multiple turns of weak attacks, demanding that players have either efficient damage or strong Block by the time they reach elite encounters.

The Ironclad can handle Byrdonis with Bash to apply Vulnerable followed by heavy hitters like Pommel Strike and Twin Strike. Shrug It Off provides reliable Block against Byrdonis's attacks. The Silent should use Neutralize for Weak application and stack Poison from Deadly Poison or Poisoned Stab. Backflip provides both Block and card draw. The Defect's Lightning orbs from Zap and Dualcast provide consistent damage, while Frost orbs help survive the incoming hits.

Defeating Byrdonis rewards a relic and potentially the Byrdonis Egg quest card, which is a unique quest-type card that offers a powerful reward when its condition is fulfilled during combat. For the Necrobinder, Osty absorbs Byrdonis's attacks via Bound Phylactery's passive summoning while Poke and Blight Strike deal damage. The Regent should balance Star generation from Venerate and Falling Star with defensive plays. Byrdonis is a common reason players avoid early elite fights if their deck lacks a clear damage plan.

Details

Enemy TypeElite
NoindexNo
In GameConfirmed

Guides & Articles

Quick Facts

Type
Enemy
Game Version
Early Access (March 2026)
Confidence
Medium
Verified
Mar 12, 2026

Sources

game-research.md; Mobalytics compendium

Incomplete — This entry is being expanded. Some fields may be missing.