Eventide is the second set in the Shadowmoor block. Eventide introduces two new mechanics called Retrace and Chroma. Retrace allows one to play a card out of one’s graveyard with the added cost of discarding a land. Chroma makes mana of a certain color a variable that determines the effect of a card.
Blue/red got a lot of strong cards in Eventide, and Crag Puca is no exception. The thing about Crag Puca is that it's a great way to play mind games with your opponent. Put your opponent in a position where they have to choose between blocking the Puca and another strong attacker - if they choose to block the Puca, keep it at 2/4 and let it soak up the damage; if they choose to block the other attacker, switch the Puca's power and toughness to 4/2 and give it to 'em in the face! It's even better with Clout of the Dominus, but then, so is everything.
-- By Will B. Staples from Springfield, MA on September 14, 2008