Apocalyptic Blood Battle

All creatures you control gain +1/+1 until the
end of the turn.
Untap all creatures that attacked this turn. After
this main phase, there is an additional combat
phase followed by an additional main phase.
-During the first combat, White creatures gain
Lifelink.
-During the second combat, Black creatures gain
Deathouch.
"Everyone fights tonight, take the city by sunrise!"