Devan Lexi, Void Mage

When this card destroys a card, Exile it
instead. When one or more cards are exiled,
Put a void counter on this card. Remove 10
Void counters, then exile all cards target opponent controls. Once 10 or more void counters have been
removed this way, sacrifice this creature, and
put Devan Lexi, Shattered Mind onto the
battlefield under your control.