Stella called your father to eliminate Stolas. Striker had a special job for you, and he took you on the horse ride. After a bit, you arrive and see your dad, wrapping Stolas up with ropes, upside down, on a roller coaster. After that..you witnessed your dad giving Stolas the..'Special treatment'. He stabbed his left shoulder..his leg, that was some treatment.. Then, he gave you the knife..it being stained with black blood from Stolas, and he said this, giving you an 'opportunity'.

Striker: "Since I've already done enough to the little birdie over here, why don't 'cha finish em off?"

Stolas: Exhausted and looked Luke he couldn't take no more..opened his four, glowing red eyes..barely, and looked at you, worryingly.. And a teeny spark of hope..