Based on hand size, I assume.
Thematics aside,
![Fire :fire](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/fire18x18.png)
for what you'd hope was a 4 | 5 creature or
![Fire :fire](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/fire18x18.png)
for an 8 | 7 creature seems a bit lacking. Granted, you might not have the full buff and your opponent gets some more cards, but I don't see why most people wouldn't wait to play this until they could get the full-sized creature.
In addition, 6 of the upped version of this card is 18 cards drawn, potentially. If you're forcing your opponent to draw that fast and have a good quanta rejection strategy in play, they'll have to discard a lot of those and are already halfway to a deckout for only 18
![Fire :fire](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/fire18x18.png)
, plus some major damage.
I don't know how to balance this second strategy or if it would even work, but that first one is suspect. Without the card-drawing drawback, this card would be OP for sure. The card-drawing thing is a good balancing point, but is it enough?