Beauregard of the Council

Whenever an opponent exiles a card from their library, put a +1/+1 counter on Beauregard of the Council for each card exiled this way.
{1}{b}{b}: Target opponent exiles cards from the
top of their library until they exile a nonland
card.
"No great death scene is complete without the
triumphant return! Truly, Osinard has never seen
an actor of my caliber!"