Zephyr, the Wise

+2: Look at the top two cards of your library. If there is a creature, you can place it on the battlefield for half its mana cost (rounded up).
-3: Create X number of 3/3 Owl creature tokens with flying and first strike, X being the number of Owls on the battlefield under your control.
-10: Choose one: Detain two creatures until the start of your next turn or search your library for two creatures and put them on the battlefield.