The shared egg artwork, one image per first type. Every creature of that first type uses this image for its own egg. Click the type badge to open that type's page.
Chance (%) of the hatchling's grade for each egg grade. Rows sum to 100%. The egg's grade weights the roll — it does not fix the outcome.
Every creature has its own egg. Hatching an egg always produces that specific creature — a Bristle Egg hatches a Bristle, a Nightmare Egg hatches a Nightmare. There are as many eggs as creatures in the tower.
Egg artwork is shared: an egg's shell shows the creature's first type, so every creature whose first type is Beast uses the Beast egg image, and so on. The image is cosmetic — it does not change what hatches.
Eggs drop at a grade on the shared 10-tier scale used across the game (Worn → Common → Uncommon → Rare → Epic → Legendary → Abyssal → Divine → Primordial → Void). Each grade of egg has a chance to hatch a creature of each grade — every egg can hatch a creature up to 4 grades above its own grade (never more) and any grade below it. Higher-grade eggs shift the roll upward and away from the low grades, but the top grades stay rare from any egg. The exact weights are the table above.
Eggs are never tradeable. A creature enters the marketplace only after it hatches.
encounter_weights.csv authors 12% SSR at floor 101 rising to 50% at 119, and every spawn slot is an independent roll on it. The grade band is authored but unconfirmed on release: the Apex bands in drop_grade_weights.csv still include Abyssal, and the fold into Legendary has not been observed in the shipped bytes.encounter_weights.csv ramps SSR from 12% at floor 101 to 50% at 119 and every spawn slot rolls it independently. The Apex has been on release since 0.48 (2026-08-13); the sentence had been telling readers otherwise for four weeks. The grade-band half is deliberately NOT claimed — the Apex bands still list Abyssal and the fold into Legendary was not observed in the shipped bytes, so the text says so. DESCRIPTIVE ONLY: no game behaviour changes.encounter_weights.csv rows 101–120) and re-authored boss egg weights (codex/apex_boss_egg_rarity.csv) replacing the tower's 30/30/20/10/10.egg_hatch_weights.csv and told to the client, idempotent on the egg id so an egg can never be re-rolled. An unauthored egg grade hatches nothing.