a sapsifterint is a mob without a true form it turns into other mobs to scare others away, one second a penguin, the next a poptop it can defend itself by punching the enemy, if tamed it can scare away mobs for you or it can be used as a mount if it shifts into a ride-able mob
I like the idea, but the way in which mobs will be tamed has already been decided. You need to lower their health to a certain level first.
