Ah. I remember glancing at this before, but not replying.
It's interesting that it's AoE, but 'specialized'. I think this area could be explored more. No matter which option the surrounding damage is (adjacent or all bordering) it won't go beyond one hexagon, right? The design fits the mechanic, and, not to be on the bandwagon, but I'm not sure I'd like this in Fire, because of the amount of CC. But I am curious as to how much this would replace Fire Bolt, as this card takes up a good portion of its niche.
If you do it on the third row of your field, does it cross over to the opponent's?