Guts, The Black Swordsman

When Guts enters the battlefield, create a "Dragonslayer Sword" token that attaches to a target black knight creature, granting it +4/+4 and Trample. When a Demon goes to the graveyard, the artifact equipped to Guts gains hexproof until your next upkeep.

Berserk {b}{b}{1}-Guts gains Double Strike until the end of turn.
Once per turn, you may sacrifice a demon creature; if you do, Guts gains Rampage 2 until the end of the turn.

Guts-"This Sword is proof that I have lived.."