Long Forgotten

Whenever a creature you control dies, you may
pay {2}. If you do, entomb 2. (Exile the top two
cards of your library face down. A player may look
at any entombed cards they own at any time.)
Whenever a creature an opponent controls dies,
that player may pay {1}. If the player doesn't,
return target entombed card to its owner's hand.
It's called adventuring, so long as you put what you
steal to good use.