shiny mimikyu pokemon card [S5I] V 073/070〈SR〉 Pokemon - Mimikyu ex 069/159

High Troller generates ludicrously swingy board states, which is exactly what some Commander players love to do (and I had a blast losing to it in a protracted board game where it survived by ludicrous variance and eventually killed me)

Psychic Energy My personal favourite especially as Ive used and fine tuned a not-at-all tournament legal Deoxys deck with Nidoking and Nidoqueen support, which is on its latest iteration after having first been built close to twenty years ago of all the basic Energy types is Psychic Energy

both cards allow you to load up your creatures with +1/+1 counters when you gain life

Okay, so its not the most powerful card in Commander, but its an underappreciated mana rock

This protects your creature outside of combat and makes them scary to block during combat