Consider what these Pokmon need to be successful and how Trainer cards can protect these Pokmon or attack an opponent
Suppose your cunning opponent casts Maelstrom Pulse targeting your Geralfs Messenger
Control the battlefield, expand your underwater armada, and overwhelm your opponents before they can mount a defense
Lets look at which decks benefit the most from the rotation
There are a number of cards you can't use in Explorer: Expressive Iteration Field of the Dead Geological Appraiser Karn, the Great Creator Kethis, the Hidden Hand Leyline of Abundance Lurrus of the Dream-Den Nexus of Fate Oko, Thief of Crowns Once Upon a Time Teferi, Time Raveler Tibalt's Trickery Underworld Breach Uro, Titan of Nature's Wrath Veil of Summer Wilderness Reclamation Winota, Joiner of Forces MTG Alchemy banlist Alchemy is another digital format for MTG Arena, which is based on the Standard card pool
I was definitely wrong on this one