That can sacrifice itself every turn to get triggers off Mayhem Devil or Bastion of Remembrance
How the Pokemon TCG Became a Global Phenomenon The Pokmon TCG grew alongside the Pokmon video games, anime series, and merchandise
Flavorfully, it sort of represents a feeling of creeping dread that gradually becomes abject fear

The Rise of the Floodborn Amethyst and Steel Deck contains: 1x Merlin Shapeshifter (Foil) 1x Tiana Celebrating Princess (Foil) 3x Chip the Teacup 2x Dr Facilier Savvy Opportunist 3x Heihei Persistent Presence 3x Kuzco Wanted Llama 1x Madam Mim Fox 3x Madam Mim Snake 2x Merlin Crab 3x Merlin Goat 1x Merlin Rabbit 2x Merlin Squirrel 2x Freeze (First Chapter) 2x I'm Stuck 2x Beast Forbidding Recluse 2x Benja Guardian of the Dragon Gem 2x Cinderella Knight in Training 2x Eli La Bouff Big Daddy 2x Hercules Hero in Training 1x Kronk Junior Chipmunk 2x Lawrence Jealous Manservant 3x Lilo Galactic Hero (First Chapter) 2x Prince Eric Dashing and Brave (First Chapter) 3x Prince Naveen Penniless Royal 1x The Huntsman Reluctant Enforcer 2x The Prince Never Gives Up 3x Tiana Diligent Waitress 2x Last Cannon 2x Mouse Armor The cards marked as First Chapter are from The First Chapter set, all the others are from the Rise of the Floodborn set

Several Pokmon cards found in the upcoming expansion - not just the ex kind - enable players to obtain, move and expel energy cards to gain an advantage
Its a great answer to control decks since it makes tokens on cast, minimizing the usefulness of countermagic, and is practically impossible to remove