CURATOR COMMENTTo get this card Crucible-approved:
-Cite the artist's name in the table and in the bottom left of the card art picture (the artist's name is jessicawolf2002, found here:
http://media.photobucket.com/image/dragon%20breathing%20fire/jessicawolf2002/Dragon%20Pics/dragons_lair.jpg)
-Make sure you get permission from the artist saying it's okay to use the art
-Fix the discrepancies between the card text and the Ability description in your table ("opponent's" is spelled wrong on the cards)
Oh boy. As if Fire needed ANYMORE crowd controlling abilities - you may want to distinguish what creatures are considered 'dragons' in your Notes section, if not explain the potential of having a 'Dragon' passive for this card to combine with correctly. Another thing is that the wording seems a little bit superfluous - perhaps you can shorten it to something like this:
"Bestows a dragon-creature with Dragonfire.
Dragonfire:
Deals damage inversely proportional to the
number of creatures on the field."
This way, you not only see what type of 'creature' can be used with the spell, Dragonfire, but you also figure out how much the ability costs, and how the mechanic works within a certain amount of lines. ^^ Just a suggestion, of course. Also, the 'cool down' is unnecessary - placing a high cost on the ability itself can be a good limiting factor, even with Shard of Readiness (it's an expensive combo to use all three I'm assuming: Dragon + Dragonfire + Shard of Readiness).
Even though I think Fire has enough spells in its arsenal to kill off the enemies creatures either directly or passively (Rain of Fire, Fire Lance, Fire Buckler, Rage Potion), I suppose that this would be a nice card to make Dragons more 'lively' in the game as a whole.