The goat horn should give a potion aura to nearby players when used.

You should be able to brew potions with a goat horn instead of a glass bottle, and blowing the horn should give a 1/4 potion effect for 2 times the duration in a radius of 10 blocks around the user, giving the effect to all players/player controlled mobs (golems and pets namely). It would have a cool down of 1.5 times the potion effect used, have a durability of 8 uses, and be able to be recharged with potions in cauldrons. The enchantments unbreaking, fire aspect (sets nearby enemies on fire for 2*(enchantment tier) seconds), and double edged (makes it so second effect is applied if used less than 2 seconds after end of first activation). Note: adverse effects would be applied to enemies, not allies. 2nd Note: if effects levitation and weakness are used together to levitate an enemy off the ground and then kill them with fall damage, the following achievement [ {slam dunk} ] will be gained.