Jump Boost

Jump Boost is a status effect that increases the jumping height of the bearer.

Mechanics

Jump Boost increases the jump strength of the player from the base 0.42 blocks/tick (countered by gravity to give the maximum jump height). Each level increases the player's jump velocity by 0.1 blocks/tick. It also reduces one block height in fall damage calculation each level. Arbitrary levels can be set via commands. , negative levels decrease jump height and increase fall damage (which also causes the player to start taking damage from short falls that would normally do no damage); extreme negative levels eliminate all jumping ability and cause damage even when stepping off a slab.

Immune mobs

Withers and ender dragons are immune to Jump Boost. Flying mobs, hovering blazes, and shulkers are unaffected by jump boost.