punch spells require a strong creature
The creature chosen at random isn't targeted, so a creature with shroud or an opponent's creature with hexproof can be chosen this way
Gone are the days people would run commanders just because they were the colours they wanted access to Card advantage every top commander provides card advantage in some way, whether its literally drawing cards, card selection via scrying or similar, bringing cards back from the graveyard, tutoring, or even producing permanents such as tokens
This way, you can justify running this elemental avatar as your green commander, as itd be easy to play a 12/12 for 6 mana with enough investment
Among the best options for this are Felidar Sovereign with lifegain, Palinchron for infinite mana with Deadeye Navigator, or any of the dozens of combos you can make with Intruder Alarm
I envision a Gruul Aggro deck utilizing powerful old cards like [Card]Embercleave[/Card] and [Card]Gruul Spellbreaker[/Card] alongside the new cards, including Klothys and Gallia of the Endless Dance