Valkroth, The Oblivion

Eminence — Whenever you mill or discard one or more cards, if Valkroth is on the battlefield or in the command zone, create that many 1/2 blue and black Demon creature tokens with flying and “When this creature dies, target player discards a card.”

Trample, Flying

Whenever a player discards one or more cards, you may draw that many cards. Creatures you control
get +1/+1 until end of turn for each card drawn this way.