Deck is based on manifest mechanics, trying to abuse turning manifested morfs back for creature cost.
Surprise section
Hooded Hydra - while manifested, can be turned face up for GG, resulting in 5/5 creature.
Icefeather Aven
- while manifested, can be turned face up for 1 mana cheaper than morph cost. Can be used turn2 by himself, being awesome flier for 2 CMC.
Hornet Nest - this deck isn't fast, so there is nothing bad in adding a wall here. Can be turned face up from manifest creature while block/blocked, adding huge element of surprice.
Yasova Dragonclaw - nice 4/2 with trample for 2U, our colors fit her ability. Can add some power when turned up from manifest creature, which is helpful.
Manifest section
Whisperwood Elemental - manifest every turn with a nice body. Manifesting at the end of the turn makes it even better, since it manifests at the same turn it comes to board.
Wildcall
- this one can be casted as GG manifest without counters (resulting in at least a bear), and can be scaled up adding more mana.
Write into Being
- have better chances to bring you a creature from "surprice" section. If not, it is at least scry2.
Cloudform
- in worst scenario, it is 2/2 hexproof, flying, which is awesome for 3. Best scenario - it is something more than that. Note, that creature can be targetted after destroying an aura.
Ethereal Ambush
- two manifests at instant speed for 5. Isn't cheap, so have 3 copies of that.
Accelerator section
Trail of Mystery
- increases surprice power, fetches lands from nearly every card we have in this deck.