Surestrike Trident  (2) 
Artifact — Equipment 
Equipped creature has first strike and ", Unattach Surestrike Trident: This creature deals damage equal to its power to target player or planeswalker."
Equip  (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)