You are never forced to activate mana abilities to pay costs, so if there is a mandatory additional mana cost (such as from Thalia, Guardian of Thraben), you can decline to activate mana abilities to pay for it and hence fail to cast the suspended card, leaving it in exile
Ryusei, the Falling Star really just acts as weenie removal and a sac source from a flyer
That card had a pretty handy combo thanks to a card that let you play it without evolving it
This is a big downside, and hurts this cards chances of thriving in Expanded because the original Mewtwo-EX can take it down pretty easily, but it still has plenty of potential in Standard
This aura pumps the enchanted creature for each other creature that shares a creature type with it, which can be an absolute game-ender
Activate only as a sorcery." Whenever you activate an ability that targets a creature or player, copy that ability