Mazz Unden

Put a +1/+1 counter on Mazz Unden for each
time he is cast from the command zone.
When Mazz Unden deals to or is dealt damage
by another creature, he gains one static ability
from that creature, or a +1/+1 counter.
Counters and abilities remain with Mazz Unden
each time he is cast or enters the battlefield.