Stormbreaker

Equiped Creature get +2/+0 and it's
unblockable.
Equip {2} (Equip as a sorcery.)
"A king's weapon. Meant to be the greatest in
Asgard. In theory, it could even summon the Bifrost."
"Does it have a name?"
"Stormbreaker."
—Eitri and Thor