Byrdonis EggQuest
Can be hatched at a Rest Site.
Is Byrdonis Egg good in Slay the Spire 2?
Byrdonis Egg is a quest Quest quest in Slay the Spire 2. In combat it resolves as: Can be hatched at a Rest Site. It currently underperforms most alternatives, sitting at F tier in our Slay the Spire 2 card rankings.
Across 23 recorded runs, decks running it win 0.0% of the time, trailing the 18.9% average by 18.9%. It’s a more selective pick, turning up in just 0.6% of decks that could run it. Ironclad players keep it in 1.0% of their runs, so it’s a familiar sight in those decks. On average it shows up 1.0 times in the decks that take it.
It performs best next to Bash — together they post a 0.0% swing in win rate. It also has strong chemistry with the relic Bound Phylactery, which moves its win rate by 0.0%. At - energy, it’s upgraded in 0.0% of runs and usually joins the deck around floor 7.
That’s 0 wins, 19 deaths, and 4 abandoned runs with it in the deck. The encounter that most often ends a run carrying it is Phrog Parasite Elite, which closes out 21.7% of its appearances. Read on for Byrdonis Egg’s complete synergy, class, and threat breakdown to decide whether it earns a slot in your Quest run.
Byrdonis Egg Win Rate & Pick Rate
Byrdonis Egg’s 0.0% win rate trails the 18.9% all-deck average by 18.9%, the gap charted below.
Run Outcomes with Byrdonis Egg
Byrdonis Egg has 0 wins and 23 losses over 23 tracked runs (0.0% won); abandoned runs count as losses.
- Wins 0.0%
- Losses 100.0%
Best Cards to Pair with Byrdonis Egg
Ranked by win-rate lift, Byrdonis Egg performs best alongside Bash (0.0%), Bodyguard (0.0%), and Breakthrough (0.0%).
Based on small co-occurring samples — treat these as early signals, not final verdicts.
Byrdonis Egg Win Rate by Class
Byrdonis Egg is played across 5 classes, led by Ironclad (0.0%), Necrobinder (0.0%), and Defect (0.0%) by win rate.
Best Relics for Byrdonis Egg
Byrdonis Egg pairs best with the relics Bound Phylactery (0.0%), Large Capsule (0.0%), and Divine Right (0.0%), ranked by win-rate lift.
Bound Phylactery5 runs
Large Capsule4 runs
Divine Right3 runs
Scroll Boxes3 runs
Red Mask3 runs
Burning Blood7 runsBased on small co-occurring samples — treat these as early signals, not final verdicts.
Byrdonis Egg Card Details
Byrdonis Egg is a quest quest costing - energy; it’s upgraded in 0.0% of runs and usually picked up by floor 7.
Can be hatched at a Rest Site.
What Ends Runs with Byrdonis Egg
Byrdonis Egg’s most common run-enders are Phrog Parasite Elite (21.7%), Bygone Effigy Elite (13.0%), and Vantom Boss (8.7%).
- Phrog Parasite Elite21.7% of runs
- Bygone Effigy Elite13.0% of runs
- Vantom Boss8.7% of runs
- The Kin Boss8.7% of runs
- Byrdonis Elite8.7% of runs
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Byrdonis Egg – Frequently Asked Questions
Is Byrdonis Egg good in Slay the Spire 2?
Across 23 tracked runs, Byrdonis Egg has a 0.0% win rate — +18.9% below the average deck. Win rate reflects how often runs that include the card end in victory.
What does Byrdonis Egg do in Slay the Spire 2?
Byrdonis Egg costs - energy. Can be hatched at a Rest Site.
What class is Byrdonis Egg in Slay the Spire 2?
Byrdonis Egg is a Quest Quest Quest.
Is Byrdonis Egg worth upgrading in Slay the Spire 2?
Byrdonis Egg can be upgraded at a rest site to improve its effect.
What is the best relic for Byrdonis Egg?
In tracked runs, Byrdonis Egg has performed best alongside Bound Phylactery, which lifts its win rate by 0.0% over 5 runs together.
See Also
Compare Byrdonis Egg with the rest of the best Slay the Spire 2 cards, relics, and classes below.