Wizards
You can find these pyromaniac devils in swamps, if you’re lucky, daylight hours (they’re a bit scared of the dark). They like emeralds, quite a bit, so if you’d like them on your team be prepared to pay up. Just ‘tame’ them like you would a pig or tiger or a Keeper Creeper and they’ll be yours for life. Three sorts of friendlies – white, green, grey (most common, garden variety wizard).
They will attack ANY hostile mob. They’re not the least bit fussy. But if one gets too close they’ll run for it, and resume their fireball shenanigans once they’ve reached minimum safe distance.
You can heal them with their favorite foods – pumpkins and baked potatoes.