Let me start by explaining that I know this card probably isn't balanced, I'm not that great at doing that (hence why I've posted this). Basically I wanted a controllable version of Sphere of Resistance. So here's my little creation at the moment.
Sphere of Denial

Artifact
Each spell costs

more to play for each card in its owner's hand.

or 1 life: Discard a card at random, any player may play this ability any time they could play a sorcery.
"As one's knowledge grows, so does the impending insanity within."As I said it probably isn't balanced properly, I'm wondering whether the discard should be random or not and whether this should cost more.
Current Wording:
Sphere of Denial

Artifact
Each spell costs
more to play for each card in its owner's hand.
or 1 life: Discard a card at random, any player may play this ability any time they could play a sorcery.
"As one's knowledge grows, so does the impending insanity within."