/effect

Syntax

/effect clear [<targets> [<effect>]]

/effect give <targets> <effect>

/effect give <targets> <effect> infinite [<amplifier> [<hideParticles>]]

/effect give <targets> <effect> <seconds> [<amplifier> [<hideParticles>]]

Argument	Kind of value	What to type
<targets>	Target selector	The entities to affect. Only living entities such as players and mobs can have effects. One or more entities.
<effect>	Game id	The effect id, for example minecraft:speed, minecraft:regeneration, minecraft:night_vision, or minecraft:instant_health. The id of an effect.
<amplifier>	Whole number	The strength of the effect, from 0 to 255. 0 is level I. Defaults to 0.
<hideParticles>	True or false	true to hide the effect's particles, false to show them. Defaults to false.
<seconds>	Whole number	How long the effect lasts, in seconds. A whole number from 1 to 1000000. Defaults to 30 seconds. From 1 to 1e+06.

Permission level	2: operators, worlds with cheats on, command blocks and functions
Works in	Singleplayer with cheats enabled and multiplayer servers. Needs permission level 2 (gamemasters): server operators, players with cheats, command blocks, and functions can all run it.
Result	Reports which effect was applied or removed and for whom. The number /execute store saves is the number of entities that received the effect or had effects removed.
give	Applies an effect to the targets. Without a duration it lasts 30 seconds. Instant effects such as Instant Health are applied once.
give ... infinite	Applies the effect with no time limit. It stays until it is removed.
clear	Without arguments, removes all effects from yourself. With targets, removes all effects from them. With an effect as well, removes only that effect.
Duration	The duration is given in seconds, from 1 to 1000000. For instant effects the number is counted in ticks instead.
Amplifier	The amplifier is the effect level minus 1, from 0 to 255. 0 is level I, 1 is level II. Defaults to 0.
Particles	Set hideParticles to true to apply the effect without showing particles around the entity. Defaults to false.
Failure reasons	give fails if no target could receive the effect, because the targets are immune, are not living entities, or already have a stronger version. clear fails if no target had an effect to remove.

/effect give @s minecraft:speed

Gives you Speed for 30 seconds.

/effect give @s minecraft:night_vision infinite

Gives you Night Vision until it is removed.

/effect give @a minecraft:regeneration 60 1

Gives all players Regeneration II for 60 seconds.

/effect give @s minecraft:invisibility 120 0 true

Makes you invisible for 2 minutes without particles.

/effect clear @s minecraft:poison

Removes Poison from you.

/effect clear @a

Removes all effects from every player.