I have a few problems with the cards:
Dark ones just BEG for rainbow decks to choose them; they would make god farming almost TOO easy.
Same with Aether and Time (and isn't the time just aether with more of a cost? :S). OP. In fact, even more OP since you can find two.
Earth is underpowered. I would NEVER discard cards from my hand unless I absolutely HAD to.
Same with Entropy (lol @ discarding full hand) and Gravity.
For Life, the unupgraded version is MUCH better than the upgraded one. I mean, if I had 12 life quantum, I could use 10 life and draw 5 cards with the unupped. With the upgraded one, I would have to spend ALL 12 life for only four cards.
In general, any card that would let you draw more than 2 is overpowered. I approve of the light and fire ones though
![Cheesy :D](https://elementscommunity.org/forum/Smileys/solosmileys/cheesy.gif)
.
As a side note, most spell upgrades either effect the quantum cost or the effect, almost never both. And when it IS both, one of the effects is generally negative (ie sundial; decrease playing cost but increase ability activation cost). Your Gravity upgrade both upgrades the effect AND the cost.