Mjolnir

Mjolnir can only be equipped to Thor, God of
Thunder or Steve Rogers, Captain America.
Equipped creature has +3/+0 and "Whenever this creature attacks, it deals 2 damage to any target."
{5}: Return Mjolnir from your graveyard to the battlefield. Activate only if you control Thor, God
of Thunder or Steve Rogers, Captain America.
Equip {1}