The Hoard Approaches

Undeath Amass 3 (Put 3 +1/+1 counters on Undead Hoard. If you don't control an
Undead Hoard token, create one and put 3 +1/+1 counters on it.)
If you control a Necromancer, Undeath
Amass 5 instead.
They just keep making more . . .