Marked Bolt
Aims at the single sturdiest foe.
Pros ×3 damage · stops it for 0.5 s
Cons One foe at a time
Thunder Egg is a bonus weapon in Wrath of Cluck. Its card says: “Lightning strikes nearby hamsters every 1.8 seconds and arcs to their neighbours.” You can use it from your first run. It levels up to Lv5.
| Level | Marked Bolt | Lightning Field |
|---|---|---|
| Lv1 | Lightning strikes nearby hamsters every 1.8 seconds and arcs to their neighbours. | |
| Lv2 | +1 lightning | |
| Lv3 | Aims at the single sturdiest foe. | Bolts strike nearby ground and leave shock fields. |
| Lv4 | Stop +0.4 s | Field +0.4 m radius |
| Lv5 | Mark +1 foe | +1 bolt · field +1 s |
Once Thunder Egg is at Lv2 or higher, its card opens into two branches. You pick one, and the weapon goes up one level on it.
Aims at the single sturdiest foe.
Pros ×3 damage · stops it for 0.5 s
Cons One foe at a time
Bolts strike nearby ground and leave shock fields.
Pros 2.5 s shock field
Cons Lands anywhere within 4 m · ×0.4 direct hit

Thunder Egg at Lv5 plus Magnet Beak (+35% pickup radius) at Lv1 or higher makes Thundercloud Hatchery.
Lightning jumps to other nearby enemies up to twice.
The branch you picked gives the evolution a different name: