Doomslayer, Hell Razer

Whenever Doomslayer, Hell Razer becomes blocked, untap each creature you control.
After this combat phase, there is an additional combat phase.
{3}{r}{r}{g}{g}: Doomslayer must be blocked
each combat this turn if able.
Against all the evil Hell can conjure, all the wickedness mankind can produce, we will send
unto them, Only You