Creature - Skeleton Color tag templates(None) Miasmic Mummy When this creature enters, each player discards a card
You can cast the right half of a card with Aftermath from your graveyard no matter how it got there, be it through discard, milling, or the top half resolving or being countered
After you reach 100%, you receive a rating from 1 to 1200
So, when my opponent attacks with a [c]Blightsteel Colossus[/c], I can kill it with [c]Mercy Killing[/c]
Toxic had a short competitive run in Standard and caught the attention of Commander players, especially since its somewhat easier to win with 10 poison counters than 40 damage or 21 commander damage
Or it might stay relatively cheap if its more of a casual favorite