Wavirokos, God of Myr-Salas

Indestructible
At the beginning of you upkeep, gain control of
up to one target creature an opponent controls,
that creature has base power and toughness 1/1
for as long as you control it.
Whenever a creature you control but don't own
dies, you get a doom counter. Then if you have
10 or more doom counters, you lose 5 life.