Yagg Silverbeard

Whenever you would draw a card, you may
choose instead to place a study counter on Yagg.
Whenever any counters are removed from
Yagg Silverbeard, you may draw that many cards.
Remove X Study Counters: Choose one:
-Prevent the next X damage from any one source.
-Put target artifact with converted mana cost X
in a graveyard onto the battlefield under your
control.