Roll-Random Villain in Equestria

http://powerlisting.wikia.com/wiki/Gas_Manipulation

>"Anon, we've come to defeat you!" A slightly muffled voice rouses you from your lounge chair.
>It also served as your throne.
"Oh, hey Sparklebutt." You scratch your ass. "Here to try again?"
>The smug on her face was just too cute. "Yes! And this time we came prepared."
>You lazily inspect the Mane 6's new getup.
"Gas masks and hazmat suits. Nice. So I can't use gases that can be breathed in."
>"Correct."
"Or gases that can be absorbed through the skin?"
>"Yes. You'll finally pay for all the trouble you've caused! Never will you blah blah blah"
>You fish through your pocket as Twibright goes through her spiel.
"Well then I'm sure that they are also fireproof." You pull out your box of matches and lit one.
>"-the magic of friend-uh, umm. No?"
"Pity." You flick the lit match towards the girls and the cloud of hydrogen gas that you've been building since their entrance.
>They're immediately engulfed in a ball of fire.
>It eventually dies, leaving the ponies covered in the ash of their suits with comically rendered burns on their skins.
>Only in cartoon pony land.
>All they can do is stare in astonishment at the destruction of their only protection against you.
"Maybe next time." You chuckle, scratch your ass once more and go back to your lounging.
>Twalot teleports the group with a loud annoyed grunt before you can generate anything else.
>Maybe next time you would just take away their oxygen and suffocate them.
>...
>Nah, you're having too much fun.