What I try to say is that in cards with HIGH attack stats and HIGH cost (and NOT the average attack and cost of the Abomination) only has atk=hp.
We're not talking about 3|3, 4|4 or 5|5 creatures here, but for 10|10, 11|11 or 12|12 creatures. The fact it is not truly a dragon doesn't mean something, the discussion is about its stats.
You cannot put a high attack & high health creature in an element without comparing its atk,hp and cost with another creature of the same element.
That in turn limits the freedom of design and thematic links, and I feel like you haven't considered the ability enough given that you're emphasizing attack, HP, and cost. If I had a creature with 12 | 12 and Venom, would I put in Light just because it has high attack and high health? If I had an Immaterial creature that has Vampire, would I just put in Aether because it was immaterial?
Light does not have a theme of rushing or blitzing, which I feel this card and air do (lowers cost to be played faster, though not as aggressive as
would) and while Light does have links to the sky, the clear ruler of the domain of aerial creatures is
. A secondary and more minor link could be made to
with the name of "Essence", but Essence can also be carried by the winds in some fiction and a name change could be made if needed.
So possible themes I see:
Primary/Purpose and Overall :
Secondary/Alternatives
or
Sticking too much to Element based stereotypes restricts creativity and potential for new ideas to be implemented, and even then the ideas put in may undergo huge changes before they actually hit the game (Ghost of the Past was originally a 4 | 4 creature for 4
that damaged the opponent when discarded and Shard of Serendipity was originally a Permanent that filled your hand with random cards as an ability.). While I find using the base ETG useful as a balancing tool I do not find it as useful to design themes for new cards since theme is a much more open field of interpretation.
Just compare your 11 cost 11|11 stats (or 10 cost 10|10 stats) Essence Wyrm with the 10 cost 9|6 stats Azure Dragon (or 12 cost 13|7 stats Sky Dragon). Your Essence Wyrm is OP in comparison with Azure/Sky Dragon and it would make the dragon of the sky element relatively weak and quite useless.
Azure Dragon doesn't get weaker as it's allies leave the field. Against a CC/PC-heavy or RT deck, Essence Wyrms will be much less useful because the amount of cards removed will lower their stats below an Azure Dragon's relatively quickly, making then easier to play but also weaker than Azure Dragon (which is more durable overall given that has no risk of being weakened while in the hand). Most players tend to wield CC or PC to begin with, which means by the time this card is ready to played it'll generally be at GoTP or Seraph-like stats unless you saved up 11
and protected everything.