So, this is derived from one of the parts of my game (Somnium, PM me if you'd like to hear about it), where basically the game messes with you by reversing your sound controls, switching around buttons, etc. Yes i know, i'm not the first to think of this. But anyways!
If solid and i played sealed, Solid might want to taunt me, right? So why not add some fun stuff like:
Haywire (special: you dont get this in packs, it's always available in sealed games, unlimited number allowed in a deck, takes 1 space like every other card)
Description: Allows the user to choose 1 of several things that wont effect gameplay, such as to turn off the game's music for 1 minute, reverse the color scheme, turn the camera 180 degrees, allow them to drag around the UI for both players (not submit), etc.
This would mean players who are clearly outmatched, may just have a chance, while still being fun for the clearly better player. This could also be a way to implement "Handicap" without actually having to change damage/health or anything
Just an idea