Arcanis the Omnipotent [The List] Penguin Squirrels you control have "{T}:

Squirrels you control have "{T}: Target Squirrel gets +2/+2 and gains trample until end of turn

Set: Dominaria Prerelease Promos Type: Artifact Rarity: Rare Cost: {5} {T}: Add three mana of any one color

Set: Commander 2021 Type: Enchantment Rarity: Mythic Cost: {3}{U}{U} Whenever you cast an instant or sorcery spell

In Sherlock: Case Connection

Arcanis the Omnipotent [The List] Penguin Squirrels you control have "{T}:Set: The List Type: Legendary Creature Wizard Rarity: Mythic Cost: {3}{U}{U}{U} {T}: Draw three cards. {2}{U}{U}: Return Arcanis the Omnipotent to its owner's hand. Do not concern yourself with my origin, my race, or my ancestry. Seek my record in the pits, and then make your wager.