Interesting idea. How would it work with Fractal?
Hm, that might be interesting. I'd say right now that it just fills your hand with target card. Which is probably OP considering no Aether draining.
I actually think the unupped is better than the upped given that you don't know what's going to be in your opponent's hand, and the spells that they're using are most likely going to be CC of some form.
2 for multiple spells that you can regulate is otherwise too advantageous IMHO. Perhaps you could have the unupped only copy the first spell in your hand for 2 , and then make the up utilize all spells in your hand for 5-7 ?
Maybe I could change it to be like
"Target creature is affected by the first spell in your hand, that spell is replaced with Future Effect"
That way it's like chaining but isn't. Fractal and Sky Blitz might be problems though.
Maybe you have to have at least one quanta from the element of the spells you use?
Or just make it skip over them, there are other cards that have exceptions right? Like Immo and Singu?