So much for original.
XD
Anyway, uh, lets see, zombie types:
Absorber: When it hurts you it regains hp equal to damage it does
Devastator: Fire very powerful blasts that can 1-hit an unarmored blockhead on direct impact; the blasts would be slow but get faster as they traveled, up to a maximum point. The main tactic for stopping a Devastator would be to get into melee range, as their claw attacks are pathetic at best and their devastation beams are too slow at close range and can be dodged easily.