Related effects and lists
- All Minecraft effect IDs — the full searchable list.
- Mining Fatigue — another harmful effect.
- Instant Damage — another harmful effect.
- Nausea — another harmful effect.
- Minecraft enchantment IDs — enchant your gear instead.
Slowness is a harmful (negative) status effect in Minecraft Java Edition 1.21.
minecraft:slowness
Give Slowness II for 60 seconds (Java Edition 1.13+; duration in seconds, then amplifier where 0 = level I):
Remove the effect from the nearest player:
Slowness cuts walking speed by 15 percent per level and narrows the field of view, and at high enough levels it can pin a player nearly in place.
Players usually meet Slowness through a Potion of Slowness, brewed by corrupting a Potion of Swiftness or Leaping with a fermented spider eye. The Potion of the Turtle Master bundles Slowness IV with Resistance III from turtle scutes, and cobwebs and bogged fights deliver it in combat.
Splash Slowness is underrated in PvP and mob control because it cripples escape and chase speed at once. Slowness VI from the Turtle Master potion at higher tiers slows you so much that you can barely move, which is the price of its massive damage reduction.
The effect ID for Slowness is minecraft:slowness. Java Edition 1.13+ /effect commands use this namespaced form. On Java 1.12.2 and earlier the numerical ID was 2.
Run /effect give @p minecraft:slowness 60 1 to get Slowness II for 60 seconds. The first number is the duration in seconds; the second is the amplifier (0 = level I, 1 = level II). Remove it with /effect clear @p minecraft:slowness.
Slowness is a harmful (negative) status effect in Minecraft Java Edition, based on its registry category (harmful).
Add a fermented spider eye to a Potion of Swiftness or a Potion of Leaping at a brewing stand. The corrupted result is Slowness, extendable with redstone and upgradable to Slowness IV with glowstone.
It reduces walking speed by 15 percent per level and shrinks your field of view. Sprinting still works but is equally slowed, and extreme levels make movement nearly impossible.