I think the best part of this is that you could target your stuff, or your opponent can, and you still get the benefit across all your creatures
In a fun, full circle moment, the team also enjoys that the Hasbro Iron Man helmet was shown on a kid trying to stop drones at Stark Expo in Iron Man 2 (theorized to be Spider-Man), and now that same helmet has found its way onto a Marvel Magic card in a new era crossover of the two IPs
The deck's commander, Firmuth, Sage of Corrosiveness, is a perfect example of this strategy, as he gets stronger as you mutate creatures under your control
This has a more restrictive cost and is sorcery speed
In the old Standard if you really wanted to kill creatures you could stuff your deck to bursting with creature removal