Realmforger

{2}{w}, {t}, Sacrifice a land: Create Realmhewer,
a legendary colorless Equipment artifact token
with "Equipped creature gets +3/+3 and has
double strike and vigilance" and equip {2}.
{1}{r}, Sacrifice an Equipment: Realmforger
deals X damage to any target, where X is 2 plus
the amount the sacrificed equipment increases
an equipped creature's power. (For example, if
"equipped creature gets +2/+1," X is 4.)