Mono Aether generally isn't any sort of problem to play against right now. Its typically "Mono Aether, but with a Mark of X to splash Z card" that is dangerous. For example, Mono Aether, but with a dark mark to splash Steal. Among other things, it auto-wins vs Mono Aether.
... however, my worries about this card and Steal actually grew, while at first I didn't quite like the idea of Fire lance decks splashing aether for a couple of these cards to turn their explosions into extra lances, the idea of someone using steal with this for quick auto-kill in that mono-aether deck would actually be terrible. Or even explosions, although steal would let you keep said permanent. And as I checked, using Steal does let you keep your permanent but I don't know if it counts as a destruction then. Still, explosion does.
Overall, its a good idea, but due to me not feeling good about mono-aether auto-killing with 3 Lightning Barriers and 4 explosions, either make the damage not stack, or what would probably be better, make it stack, but change the text to "deal 10 damage to the owner of the destruction card". The Mono-Aether + explosions might be a good deck archtype, I'm not sure yet, but this would be an easy way to prevent that though.
I'm pretty sure steal would count as destruction for the purposes of this card, but it probably should to make the card worthwhile. Because without it generally the only PC there 'is' rampant all around is explosion. I just wonder how the AI would function with this card.