Complex sentence: Crusader joins the rest of the Initiative in combating the Skrull invasion of New York and killing one of his friends from Skrull training who was known to have given him a scar down his face which Crusader has warn as a proud reminder.
Split into simpler sentences: Crusader joins the rest of the Initiative in combating the Skrull invasion of New York. Crusader kills one of his friends he knew from Skrull training who had given him a scar down his face which Crusader has warn as a proud reminder.