Oozer has 150 health and spawns in the swamps.
It takes extra damage from blunt, frost and lightning; it resists slash, pierce and fire; poison does nothing to it at all.
Its only attack is aoe, 115 poison.
Some of what it throws is elemental, so poison resistance is worth having.
You cannot block aoe, so give yourself room to dodge instead.
Of everything craftable, 
Lightning Strike, 
Frostfire Sledge and 
Thunderblood Sledge put the most damage through what it resists.
It always drops 
Ooze and Blob.
Oozer is a larger undead blob that spawns in the Swamp at night only, never during the day. It has 150 health with the same profile as a 
Blob, weak to blunt, frost and lightning and immune to poison, and its gas burst deals 115 poison in an 8 meter radius every 4 seconds, twice the reach of the smaller version. Killing one splits it into 2 Blobs and drops 2 to 3 Ooze, a 33% chance of 
Scrap Iron and a 10% chance of a 
Blob Trophy.
Fight them like blobs with a bigger exclusion zone, and never celebrate the kill early: the two children spawn angry. The iron drop is a bonus, not a farm.
| Where | Roll | Group | Conditions |
|---|---|---|---|
| Swamp | 20% every 120 s, max 1 near you | 1 | night only |
Each 64 m zone keeps its own timer per entry and rolls the chance once per interval while loaded; a zone never loaded before rolls the moment you arrive. The spawn lands 40 to 80 m from a player, never inside a base unless noted, and "max near you" counts the loaded area around that zone. Dungeon and camp spawners are separate and not counted here.
With devcommands enabled, this spawns Oozer in front of you. The third number is the level: 3 spawns a 2-star.
Creature ID: BlobElite · all console commands and IDs