This could be a real good muiltyplayer deck idea. Have {psychosis crawler} in play plus {jace, memory adapt} last last ability to draw 20 cards. Psychosis will do 20 damage to each opponet.
Unless you cheat the crawler out early, and have access to proliferation, that's a turn 9 combo at fastest. good finisher, but vulnerable.
Yeah it would be a late game finisher. It would prob do best in muiltyplayer. Those games can last forever