Pippin, Warden of Isengard can be especially useful thanks to its two abilities
Xyris, the Writhing Storm A source of card draw, a wincon, and a good forced card draw commander
Then, for 6 mana, you can transform it into Ifrit, Warden of Inferno, a hulking 9/9 saga demon that brings fight-based removal and a burst of mana, and that eventually flips back to Clive for another round
The term "defending player" in the myriad rules (or any other ability of an attacking creature) refers to the player the creature with myriad was attacking at the time it became an attacking creature this combat, the controller of the planeswalker the creature was attacking at the time it became an attacking creature this combat, or the protector of the battle this creature was attacking at the time it became an attacking creature this combat

$0.79 Iridian Maelstrom Dominaria United Commander Decks $5.99 Kethis, the Hidden Hand Core Set 2020 $4.99 Timeless Lotus Lorwyn Eclipsed Commander Decks $1.79 Hajar, Loyal Bodyguard The Brothers' War $0.59 Jodah, Archmage Eternal Dominaria $5.49 Leyline of the Guildpact Murders at Karlov Manor $1.29 Jhoira, Weatherlight Captain Edge of Eternities Commander Decks $2.79 Kellan, the Kid Outlaws of Thunder Junction $0.79 Serah Farron Final Fantasy $2.29 Primevals' Glorious Rebirth Dominaria $1.29 Ramos, Dragon Engine Foundations $0.49 Jegantha, the Wellspring Lorwyn Eclipsed Commander Decks 0 results found
I have made a list of the cards that I think do some of the most to enhance the game play in the cube by virtue of reducing luck based wins