On my upkeep controlling a Dark Confidant I trigger revealing a card and losing life to it's cmc cost. What happens if I have a split card with 2 identifiable spells? Do I get to choose which one I would prefer to lose my life on?
If it's somewhere other than the on the stack or if it's fused, a split card has two CMCs. You'll lose the life equal to both of the cards CMCs.