How about 3/2 with lower damage (like 10)?
That way it'd be a fun gimmicky card in bows, while 6x this +midgate doesn't insta-kill.
Btw, permanents appears much more than spells in mono/duo decks (i.e. pillars/pends), and this is a great nerf VS novas/Immolation based decks. Although discard creature might be too much of a penalty, though.
Give this card a way to self-destruct and I'll feel like being in a casino while messing around with this
If I lower the damage, then the penalty of discarding creatures may seem too harsh
How about lowering the damage dealt to opponent to 12, but the dice will destroy themselves if they draw a weapon / shield ?
Maybe the whole set can be changed to :
1. If spell, discard that card
2. If creature, deal 12 damage
3. If weapon/shield, destroy the dice