Cyto 053 is an aggressive monster with 156 HP found in Reactor Shaft and Crazy Factory. Defeating it gives 44 experience.
Aggressive monsters attack you as soon as they see you, so approach with full HP.
Where to find it
| Reactor Shaft | 10 | 4 min | 5, 144 · 7, 119 · 7, 89 · 5, 61 · 7, 33 |
| Crazy Factory | 12 | 90 s | 19, 18 · 17, 52 · 46, 51 · 49, 24 · 62, 40 · 28, 67 … |
Drops
Cyto 053 has 1 item drop of its own; the rarest is Metal Part at 9% per kill (about 1 in 11).
 Metal Part | 1 | 9% | about 1 in 11 | Uncommon | |
 Alduin | 1 | 10% | about 1 in 10 | Uncommon | Every monster |
 Halloween Candy | 1–3 | 2.44% | about 1 in 41 | Rare | Halloween only rolled separately, straight into your bag |
One kill gives at most one of the regular drops (the rarest is tried first). Chance of no regular drop: 81%. Pet and seasonal drops are extra rolls on every kill. Items are protected for the player who made the kill for a short time.