Ol' Wiz, The Bounty Master

Flying

Whenever Ol' Wiz or another outlaw enters the battlefield, put a bounty counter on target creature
or planeswalker an opponent controls.

Whenever a creature or planeswalker with a bounty counter dies, you and the controller of the source
that caused it to die, each create a Treasure token.

"Assassins, Mercs, Swashbucklers, Cutthroats, and
Pact Makers, here's your target." —O'l Wiz