here are 2 cards which if played right make a funny combo ^^
Illusion (permanent)
cost:
10 aether quantums
effect:
cumulative cost 5 (at end of every turn pay 5 quantums, the amount is doubled every turn (so first rund 5, then 10, then 20, 40, 80, 160) if you can't pay the cost the card is destroyed)
when Illusion comes into play gain 100 hp, when Illusion leaves play lose 100 hp, the dmg can't be reduced or redirected(so can't be affected by phase shilds or armagios or things like that)
This card cannot be stolen or destroyed (unless you can pay the cumulative cost)
Donation (spell)
cost:
5 aether quantums
Effect:
target player gains control of target permanent you control (so you can destroy immaterial weapons like morning star since you don't destroy them you just exchange them with your current weapon)
the combo is played like this XD
you play illusions gain 100 hp, then play donation on it and give it to your opponent xD (since it can't be destroyed or stolen it is possible since you give him the card by yourself and he has to pay the cumulative cost otherwise he will lose 100 hp XD)
of course some say it's overpowered but i thought of this just for fun and donation is not that overpowered ;-)