Here is the answer to yesterday's Magic Puzzle:
The face-down creature must be Broodhatch Nantuko. To win the game, block the Slipstream Eel with your face-down Nantuko, turn it face up, and create six Insect tokens. (Tony can use his Daru Healer to prevent one damage so you only get five tokens, but it won't make a difference.) On your turn, play Biorhythm. Tony goes down to 3 life, while you actually gain life (up to 5 or 6)! Then attack with all your token creatures for the win, as Tony cannot block enough of them to survive!