Counterspell

Storm Crow

Flying (This creature can't be blocked except by creatures with flying or reach.)

Sage of Epityr

When this creature enters, look at the top four cards of your library, then put them back in any order.

Augury Owl

Flying
When this creature enters, scry 3. (Look at the top three cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Breaching Hippocamp

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, untap another target creature you control.

Mist Raven

Flying
When this creature enters, return target creature to its owner's hand.

Wind Drake

Unsummon

Return target creature to its owner's hand.