Ring of Past Masters

When Ring of Expertise attaches to a creature,
put a +1/+1 counter on that creature.
{2},{t}: Sacrifice Ring of Expertise, Draw a card.
Equip {3} It cannot be attached to a creature with
more than two +1/+1 counters on it.
"These relics allow access the Akashic Record, the
memory and wisdom of the world. Proper use means
destroying it, so that it may reincarnate. Sadly, they
are coveted by dojos covet them so as to teach their
students skill to commit base violence."