Herald of the Dreadhorde 

Creature — Zombie Warrior
When this creature dies, amass Zombies 2. (Put two +1/+1 counters on an Army you control. It's also a Zombie. If you don't control an Army, create a 0/0 black Zombie Army creature token first.)
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Maalfeld Twins 82%
$0.09#18805
"When this creature dies, create two 2/2 black Zombie creature tokens."