Diregraf Colossus enters with a +1/+1 counter on it for each Zombie card in your graveyard.
Whenever you cast a Zombie spell, create a tapped 2/2 black Zombie creature token.
Diregraf Colossus's last ability won't trigger when you cast it because it's not on the battlefield yet.
08-04-2016
wotc
If Diregraf Colossus enters the battlefield from your graveyard, its first ability will count itself among the Zombie cards in your graveyard. Similarly, if it enters the battlefield at the same time as another Zombie card enters the battlefield from your graveyard, the ability will count that other Zombie.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.