Muera, The Catalyst

At the beginning of your upkeep, you may return
up to 2 creature cards with the mana value of 3 or
less. If you do return creatures to the battlefield
they enter with an undead counter. (If the counter
is still on the creature by the next end step or when
the creature would be put into the graveyard, exile it instead).

Pay 1 life, Sacrifice a Creature: Create a treasure
token.