full art pokemon cards trainers Nurse Joy Trainer – withlovebysleepy (This effect doesnt count towards the number of Supporter cards you can play during your turn.) SWSH10 type:supporter is:fa - Card Search

Magecraft Whenever you cast or copy an instant or sorcery spell, each opponent loses 2 life and you gain 2 life

Garth does enable some combo potential though: Garth + a haste enabler like Fervor + a repeatable blink like Deadeye Navigator = you can activate Garth to make a Black Lotus, crack the Lotus to make mana, spend 2 of that mana to activate Deadeye Navigator to blink Garth, and repeat the process for infinite mana to then win with infinite Braingeysers to deck opponents or infinite damage Shivan Dragons

It might be worth using in an Affinity deck

It creates a Boo creature token each turn, encouraging you to either grow the rodent with your plus ability or 'fling' it at the enemy with the minus