The Aesir Escape Valhalla (#39)

(As this Saga enters and after your draw step, add a lore counter.)
[I] Exile a permanent card from your graveyard. You gain life equal to its mana value.
[II] Put a number of +1/+1 counters on target creature you control equal to the mana value of the exiled card.
[III] Return The Aesir Escape Valhalla and the exiled card to their owner's hand.