Primordials' Return

Whenever a creature or planeswalker an
opponent controls is dealt excess damage by a
source you control, you may discard a card, then
draw a card.
Giant creature cards in your graveyard have
"Escape - {4}{r}{r}, Exile three other cards from
your graveyard. This ability cost {1} less to
activate for each point of excess damage dealt to creatures and planeswalkers your opponent's
control this turn."