Ahrzog, Zombie Summoner

When you cast Ahrzog, 2 zombies you control get a +1/+1 counter.
{t}: Remove {x} +1/+1 counters from any number of zombies: Put half of {x} (rounded down) 2/2 zombie tokens into play.
{3}{u/b}{u/b}{t}: Distribute 2 +1/+1 counters among creatures you control, then Proliferate.
Tokens you control have Necromancy.