ziratha, wardens of metal

ascend {w}{u}{b}{r} (put 2 +1/+1 counters on this
creature, you may only use this ability up to three
times).
indestructible, vigilance
whenever you ascend ziratha, wardens of metal
search your deck for an artifact card and play it
for {0}, then shuffle your deck.
at the beginning of your upkeep choose an effect:
• put 2 +1/+1 counters on target artifact creature.
• return target artifact from your graveyard to the
battlefield.