I have a vague idea for a card but not sure how I want it implemented. The core of it is this: it's a spell card that cannot be stopped by reflect effects that will determine the winner in a sense by the number of remaining turns. I don't know whether the card should be time, death, or possibly fire, or even another element. Ideas for how the card may work is instant neurotoxin on both players or a counter that after drawing so many cards (say 10) that player loses as if decking out. I kind of like the second idea because it puts a major stop on rainbow/time decks that like to speed through their decks. Maybe reduce maximum HP every time a card is played? Help me out with your ideas.