Grow a Chicken Fighter Astro Chicken Guide: Odds & Eggs

The Astro Chick matters less for fighting and more for what it lays: it is the chicken that opens the Void Egg line. Here is how to get one, what it lays, and the multi-egg fusion players build on it.

Astro Chick at a glance

How to get Thunder Eggs

• Redeem EGGSCELLENT and LETMECOOK; each gives a Thunder Egg plus 50 Cash and a 30-minute boost. Full list on the codes page.
• Finishing the daily, playtime, and mission reward tracks hands out a Thunder Egg in one recorded run.
• Sergeant Hen (Rare, 8% from the Scratch Egg) lays Thunder Eggs 100%. This is the repeatable source.
• Viking Rooster lays Thunder 70% and Crest Rooster 40% if you already own one.

At 11% the Astro Chick is the second most common Thunder hatch after the Static Chick (14%), so a Sergeant Hen on a feeder usually produces one within a handful of eggs. More detail on the Thunder Egg chickens list.

Why you want one: the Void Egg

The Astro Chick lays Void Eggs 70% of the time. The Void pool runs Probe Rooster 25%, Moonwalk Hen 19%, Solar Rooster 14%, Little Green Chick 8%, Comet Rooster 8%, Orbital Hen 8%, Singularity Hen 8%, Astro Chick 5%, Void Rooster 3%, and Nebula Hen 1%. The Nebula Hen is a cosmic with a high HP pool and is the donor in the endgame Reaper x Nebula Voodoo build, so an Astro on a feeder is a long-term investment. See the Void Egg page and the Reaper x Voodoo guide.

The multi-egg Astro fusion

Laying traits transfer through fusion, and one player’s recorded build stacked them onto an Astro Chick until it laid Void, Nest, Thunder, and Scratch Eggs, one egg every 4 minutes. That is a single documented run, so the timer is that player’s result, not a rule. If you try it:

• Keep the Astro as the base so the Void trait stays.
• Use donors with a 100% laying trait (Sergeant Hen for Thunder, Cosmo Brat for Scratch, Classic Rooster for Nest).
• Lock the laying trait in each fusion; unlocked traits can be re-rolled. The fuse guide covers the slots and the gamepass extras.

Cosmic Beam and fighting

Creator videos describe Cosmic Beam as an area attack that damages every enemy in range and briefly stuns them, which is good for clearing the pit. No one has published damage or cooldown numbers, and the scripted tier-list videos that put Astro at the top also list chickens that do not exist in the egg index, so treat “Astro is S-tier for fighting” as unverified. Real-footage meta lists do not feature it; they feature the Voodoo Reaper and the 404 Chick with Cycle of Ash. One streamer did spot a level 44 Astro on a public server, so people do level them.

Quick answers

• Is the Astro Chick rare? Legendary, and at 11% it is one of the easiest Legendaries to hatch.
• Does it lay Void Eggs every time? 70% Void, 30% Thunder. Put it in the Incubator to bank the eggs while you play.
• Astro Chicken or Astro Chick? Same bird; the in-game card says Astro Chick.

Last checked: August 22, 2026 — we revise this page after each game update.