Target

A target is a block that provides a temporary redstone charge when hit by a projectile.

Usage
Targets emit a redstone signal when hit by most projectiles. This includes arrows, tridents, eggs, snowballs, splash potions, fire charges fired by a dispenser, and lingering potions. It does not, however, work with ender pearls or eyes of ender. This signal is stronger depending on how close the projectile is to the center of the block.

Signal
The target provides temporary redstone charges for 20 ticks if hit with a trident or arrow, and for 8 ticks if hit with another projectile. The strength of the signal is stronger the closer the projectile hits to the center of the block, from 1 to 15. Hitting the center of the block triggers the "Bullseye" advancement.

Trivia

 * It's the only block in the game that requires a hay bale in it's crafting recipe.

Gallery
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