MTG Salvation

Well, besides breaking artifacts which get charge counters easily, this also breaks so much more.

Also known in Limited as "six mana conspicuously left open."

While it won't be competitive, here is an interesting idea: Play Smothering Tithe to create a host of treasures, then use this to turn all of them into Powerstone Shards and incinerate their face with a banefire. To put this into perspective, if you have 7 mana and 5 artifacts (and between your treasures and Saheeli, sublime artificer, this is an extremely low bar), you can fire off a 25 damage Banefire. This scales up FAST and 10 artifacts would allow for a 100 damage finisher.