Gluttony

If an ally died this round, deal 4 to a unit.

If 3+ allies have died this round, summon Vilemaw.

Revive a random ally that died this round.

Obliterate all units that were summoned, but not played, this round.

Toss 3. Heal all allies 3.

Summon an exact copy of an ally. It's Ephemeral and 1|1.

Pick a follower from the top 4 cards in your deck. Draw it, place the rest into your deck, then create an exact Ephemeral copy in hand.