POTION HARMFUL Added in 1.21

Potion of Oozing how to brew it in Minecraft

A Potion of Oozing gives the Oozing effect: when the affected creature dies, two medium Slimes pop out of it. Thrown on enemies, it turns every kill into more trouble for them, or into a source of Slimeballs if you set it up right.

Brew it step by step

Put Blaze Powder in the fuel slot and up to 3 bottles at the bottom, then add each ingredient at the top.

01 + → Awkward PotionNether Wart + Water Bottle
02 + → Potion of OozingSlime Block + Awkward Potion
+ + → OptionalSplash PotionGunpowder · Throwable
+ + → OptionalLingering PotionDragon's Breath · Leaves a cloud, base for Tipped Arrows

// Fuel: Blaze Powder

At a glance

Effect: Oozing
Duration: 3:00
With Redstone: —
Level II: Doesn’t exist
Key ingredient: Slime Block

All variants and durations

Variant	Normal	With Redstone	Level II
Potion	3:00	—	—
Splash Potion	3:00	—	—
Lingering Potion	0:45	—	—
Tipped Arrow	0:23	—	—

■ Normal · ■ With Redstone · Lingering = ¼ of the duration, Tipped Arrow = ⅛

What Oozing does

HarmfulOozing

When the affected entity dies, it spawns two medium slimes.

Commands

Potion/give →

/give @s minecraft:potion[potion_contents={potion:"minecraft:oozing"}]

Splash Potion/give →

/give @s minecraft:splash_potion[potion_contents={potion:"minecraft:oozing"}]

Lingering Potion/give →

/give @s minecraft:lingering_potion[potion_contents={potion:"minecraft:oozing"}]

What happens on death

Each affected mob or player that dies releases two medium Slimes. They behave like any slime: they hop toward the nearest player and attack. When you kill a medium slime, it splits into small slimes, and the small ones drop Slimeballs.

There is a cap: the game counts the slimes already close by and stops spawning new ones once there are too many, based on the entity cramming threshold. A lingering cloud on a large crowd will not create an endless slime flood.

Good uses

Turning a mob farm into a slime source. A lingering Oozing cloud over the kill zone of a mob farm means part of the kills come back as slimes, and their small offspring drop Slimeballs. Useful if you have no slime chunk nearby.
PvP and team fights. Splash the enemy team: each player that falls leaves two slimes in the way of the survivors.
Annoying an opponent. Drink it yourself, and your killer has to deal with your slimes.

Pitfalls

The slimes attack you. Medium slimes deal real damage. Be ready to fight them, or keep a way out.
Slimes themselves are immune. Oozing has no effect on a Slime, so it cannot chain.
The ingredient is expensive. It takes a full Slime Block, so nine Slimeballs, for up to three potions. Make sure the farm pays back what you put in.
No long or level II version. Redstone and Glowstone do nothing.

Where the Slimeballs come from

Slimes spawn in Swamps at night and deep underground in slime chunks. The Wandering Trader also sells Slimeballs. Oozing belongs to the same family as the Potion of Weaving, the Potion of Infestation and the Potion of Wind Charging, all built to be used on others.

✓ Checked in Java Edition 26.3 · updated 1 November 2026