Surestrike Trident
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 unattached and stays on the battlefield if the creature leaves.)
Ben Thompson
Darksteel (DST)
• #147Rulings
“Unattach Surestrike Trident” means just that — Surestrike Trident moves off the creature it was equipping and remains on the battlefield.
(wotc • 2004-12-01)
Surestrike Trident grants an ability to the equipped creature.
(wotc • 2004-12-01)
The equipped creature’s controller chooses whether or not to activate the activated ability. It doesn’t matter who controls Surestrike Trident.
(wotc • 2004-12-01)
Rulings
“Unattach Surestrike Trident” means just that — Surestrike Trident moves off the creature it was equipping and remains on the battlefield.
(wotc • 2004-12-01)
Surestrike Trident grants an ability to the equipped creature.
(wotc • 2004-12-01)
The equipped creature’s controller chooses whether or not to activate the activated ability. It doesn’t matter who controls Surestrike Trident.
(wotc • 2004-12-01)