Seasons
Does Io's Minion stop Jewel of the Ancients from scoring its 35 VP bonus, and does it block end-of-game crystal gains?
Yes to both. With Io's Minion in play, the Jewel scores only its base 10 VP instead of 35, and Io's Minion also blocks other end-of-game crystal gains such as Ragfield's Helm. Printed prestige points are not affected.