Its Swords to Plowshares on a stick, which means flicker decks can have a field day controlling the board with Displacer Kitten, Thassa, Deep-Dwelling, and anything else that lets them flicker it
Of course, the answer to that question is probably yes if you can just end the game on the following turn
Gaston is still a decent card though, especially in limited formats
Playing Magic games for ante is now considered an optional variation of the game, and it's allowed only where it's not forbidden by law or other rules
In the Anime this cycle of abuse is perfectly on display when James of Team Rocket gets swindled into buying a Magikarp as part of a get rich quick scheme
Spells that were cast before Alisaie Leveilleur entered count