Which Marvel character harnesses darkforce energy and serves as Cloak’s partner?

Dagger

What water sport is divided into solo, duet, and team competitions? Which famous Marvel Comics event features a collision between multiple Earths leading to a new unified universe? Which deadly Marvel assassin is part of the X-Force team and known as Wade Wilson? What anatomical feature distinguishes mammals from other animals? Who was the Union spy posing as a slave who gathered intelligence during the Civil War?