In Commander, 20 damage on its own isnt enough to kill off a player in one hit, but the ability to shoot someone with this ability and then swing in with Inferno is something thats going to cause everyone else a lot of grief
The implied plan is clear, include a bunch of blight cards in your deck that put counters on your cards, and then gradually burn the opponent down with tarfire damage turn by turn
I am betting it will be an auto-include in a future Deckbuilder's Toolkit
5 Picks for Commander It might be included for the meme value, but Jumbo Cactuar has the power to one-shot any opponent in Commander
Zhao, Ruthless Admiral is a flexible creature that can go into the red-black deck, and is especially synergistic alongside permanents that can sacrifice themselves like Clue tokens
But, you take a hit on life in the form of destroyed items CMC