Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)
Based on the latest market prices tracked on TCG Stacked, Mewtwo-EX is worth about $61.90 USD
The Commander Damage Rule Piru, the Volatile | Illustration by Greg Staples The commander damage rule (some call it rule 10) is specific to the Commander format and states that if a player has been dealt a total of 21 or more damage by the same commander over the course of the game, that player loses the game
According to a report by Market Stats Ville, The global trading game card market size is expected to grow from $20.1 billion in 2021 to $131.8 billion by 2030, at a CAGR of 26.5% from 2022 to 2030
Things really take off at four mana
Sealed Deck Magic is all about creatures, so you'll want to play most of the cards in your colors that can get rid of your opponent's creatures