Duskborn, Forgotten King

Duskborn, Forgotten King's toughness is equal
to the number of cards in your graveyard + 3.
If a creature gets destroyed from defending or
attacking Duskborn, Forgotten King, exile it
and create a token copy of it on your board.
{b}{b}{b/g}{g}{g} Soul Feast, Exile target player's
graveyard and choose one until the next turn:
- Duskborn gets +1/+1 for each card exiled this way
- Gain a token copy of each creature exiled with
power 4 or greater, with haste