creature swap yugioh card Yu-Gi-Oh! - SD1 (SD1-EN018) - Structure Deck 1: Dragon's Roar - Unlimited Edition Creature Swap (World Championship 2006)

$1.99 Deceptive Frostkite Tarkir: Dragonstorm Commander Decks $0.69 Voracious Bibliophile Tarkir: Dragonstorm Commander Decks $1.49 Drowned Secrets Guilds of Ravnica $0.49 Bone Devourer (0066 - Extended Art) Tarkir: Dragonstorm Commander Decks Variants $0.59 Transcendent Dragon Tarkir: Dragonstorm Commander Decks $0.99 Voracious Bibliophile (0063 - Extended Art) Tarkir: Dragonstorm Commander Decks Variants $0.49 Welcome the Dead (0070 - Extended Art) Tarkir: Dragonstorm Commander Decks Variants $3.99 Marang River Regent (0378 - Borderless Reversible) Tarkir: Dragonstorm Variants $3.49 Teval, the Balanced Scale (0008 - Borderless) Tarkir: Dragonstorm Commander Decks Variants $1.49 Sapphire Dragon Commander Legends: Battle for Baldur's Gate $1.29 Hammerhead Tyrant (0061 - Extended Art) Tarkir: Dragonstorm Commander Decks Variants $2.29 Transcendent Dragon (0062 - Extended Art) Tarkir: Dragonstorm Commander Decks Variants 0 results found

Boundless Potential Commander aside, I think Walk-In Closet/Forgotten Cellar could grow to encompass many other MTG formats as well

Lightning round: Plane cards are 3.5x5 cards from the Planechase series that modify the battlefield and affect all players

The Energy Zone only holds one Energy at a time

Kelsiens ability to ping a creature and gain experience when it dies is easy to break with a simple Basilisk Collar, and its vigilance means you can declare it as an attacker and still use the effect to one-shot a troublesome blocker