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
Each card you cycle is back for more, and theres a bunch of Whenever you cycle or discard a card effects in Dimir to take advantage of
Ardenvale Tactician Throne of Eldraine offered no shortage of card advantage in the Adventure mechanic, and its hard to argue against the impact it had on White as a color
This puts her among the best token commanders that encourage you to be more aggressive to rapidly multiply your tokens
Or it might stay relatively cheap if its more of a casual favorite
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