The Dark Saber

Equipped creature gains +3/+3
Vigilance, Haste, and Trample.
When this card is equipped to a creature
you may have that creature do battle with target creature opponent controls.
{3}{t}: Equipped creature battles target opponents creature.
Warriors Challenge- Whenever a creature is defeated involving 'The Dark Saber'. You may exile defeated creature and return to the battlefield under your control.