This cards last reprint was in Maze of Millenia and can activate its Effect when your opponent Activates a Monster Effect on your turn
So the white court cares about loyalty, blue cares about knowledge, the black court is about persistence, the red about courage, and the green court cares about strength
they can also appear in other decks, like Nikya of the Old Ways, serving as tools to double down on anti-instant strategies
It cant be countered, which is good for the investment
Guardian Project, as a result, isnt the best in two player formats
A central question here, of course, is how TCG Pocket balances its worst instincts - its reliance on loot boxes, and all the patently compulsive effects they surface in its players - with a sense of health, balance and, crucially, actual intrinsic fun