Minecraft wiki entry for Defeating_a_village_raid, associated text: In a raid, you can also bring potions (it's best to prepare them before the raid rather than brewing them when the raid has started) to heal yourself and damage enemies as potions can be effective. Brew negative potions as splash potions (either a harming potion, a poison potion, a slowness potion, a weakness potion, or a decay potion) to throw at your enemies. Be sure to watch out because if you splash yourself with the potion then it can be bad. Poison potions and weakness potions don't work on witches, since they are immune to poison and don't use melee attacks. Use harming potions to finish them off instead (or your weapons) and watch out for any potions thrown from the witch.