Darksaber

Equipped creature gains +1/+0, Double Strike, Lifelink, Deathtouch, Menace.
On any turn equipped creature attacks or blocks, at the beginning of that end step, put Darksaber back into your library 3rd from the top, or pay its equip cost, and equip it to another creature you control.
If Darksaber is put into your graveyard, shuffle it into your library.
Equip: {1}{b}{b}, pay 3 life