: Freeze target permanent for 4 turns.
I'm not 100% sure on the upped version. Here are two options:
Upped (version 1):
: Freeze target permanent for 4 turns.
Upped (version 2):
: freeze target permanent, creature, or card in hand for 4 turns.
Perm freezing is so much rarer than creature freezing, I figured it might need an extra cost to balance it, but if that's not the case, a one cost and then upped getting five duration - just like freeze - would be fine, too. I'm a little worried that the freeze-card-in-hand will be something too obnoxious when the AI uses it versus how fun it'll be for a player to use it.