Knockback

Knockback is a basic mechanic in Terraria, whereby players and enemies are repelled in the opposite direction of an attack. Most weapons and environment objects that cause damage also cause knockback, to varying degrees. Some enemies are immune to knockback, particularly Bosses and other enemies that travel through blocks, like the Worms, Man Eater, and Cursed Skull. The Cobalt Shield grants the player knockback immunity.

The most player-induced knockback can currently be inflicted using the Thorns Potion. This is followed immediately by the Enchanted Boomerang, Thorn Chakrum, Flamarang, Hellfire Arrow, and Grenade, which all have the same degree of knockback.

Underground

 * Giant Worm
 * Devourer

Jungle

 * Snatcher

Underground Jungle

 * Man Eater

Dungeon

 * Cursed Skull

Underworld

 * Bone Serpent

Bosses

 * Eye of Cthulhu
 * Eater of Worlds
 * Skeletron