Byrdonis Nest event art, Slay the Spire 2

Byrdonis Nest

You spot an enormous Shambling Beast chase off an injured Green Byrd.

In the alcove the byrd fled from, a single unguarded egg lies abandoned.

Your stomach gurgles...
You crack the egg open and gobble it up.
Good breakfast.
You gently scoop up the egg and stow it, thinking it may hatch into something useful later.
Individual choiceEach player picks their own

What you can obtain

Card
Byrdonis Egg
Quest
Unplayable.
Can be hatched at a Rest Site.
Byrdonis EggChoice: Take the Egg
Max HP
+7 Max HPChoice: Eat the Egg

Where it appears

How ? rooms roll ›
Act 1Overgrowth
Only when
No event pet in the party yetEvery player, in co-op

What each choice does

Eat the Egg

Gain 7 Max HP.

Max HP+7
What the game says
You crack the egg open and gobble it up.
Good breakfast.

Which option to take

  • Take the Egg when a rest site is within a few floors and your HP can spare that stop: a free 14-damage attack is a premium card for the whole run.
  • Eat it when you are low, the path has no rest site before the boss, or you need every rest for healing; 7 Max HP is a solid Act 1 gain.

How it plays

  • Eat the Egg raises your Max HP by 7 and heals 7.
  • Take the Egg adds Byrdonis Egg to your deck: an Unplayable Quest card, a dead draw until your next rest site, where a Hatch option appears.
  • Hatching is your action at that site, in place of resting or smithing.
  • It gives the Byrdpip relic: the egg becomes Byrd Swoop, a 0-cost Attack for 14 damage (18 upgraded), and a Byrdpip pet with 9999 HP joins every combat, though it takes no actions of its own.

Changes by version

  1. 21 Aug 2025TextInternal playtest
    Updated text
  2. 17 Apr 2025TextByrdonis EggInternal playtest
    Byrdonis Egg event has been renamed to Byrdonis Nest
  3. 15 Sep 2023ChangeByrdonisInternal playtest
    Major Byrdonis rework: no longer has Byrdonis nest
All 5 patch notes2 older
  1. 12 May 2023Bug fixInternal playtest
    Byrdonis Nest no longer wiggles at start of combat
  2. 21 Apr 2023ChangeInternal playtest
    Byrdonis Nest is now actually killable

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today
If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.Get it on Steam