The Katana that Seals Darkness

Equip Samurai {1}
Equip {4}
Equipped Creature has +3/+0 and First strike, if the creature is a samurai,
The Katana that Seals Darkness can deal lethal damage to indestructible creatures
But a foolish Samurai warrior wielding
a magic sword stepped forth to oppose me.
- Aku, Master of Darkness