Edit: The Synchro Theme revealed!?
Seireijuuki Petolphin / Petolphin the Sacred Spirit Beast Mount
Wind Aqua / Fusion / Effect
1 “Spirit Beast Tamer” monster + 1 “Noble Spirit Beast” monster
Must be Fusion Summoned (from your Extra Deck) by banishing the above cards you control, and cannot be Special Summoned by other ways (you do not use “Polymerization”).
(1) This card cannot be destroyed by card effects.
(2) During either player’s turn: You can return this card to the Extra Deck, then target 1 of your banished “Spirit Beast Tamer” monster and 1 of your banished “Noble Spirit Beast” monster; Special Summon them in Defense Position.
Reijuutsukai no Chourou / Elder of the Spirit Beast Tamers
Wind Psychic / Effect
You can only Special Summon 1 “Elder of the Spirit Beast Tamers” per turn. (1) During the turn this card was Normal Summoned, you can Normal Summon 1 “Spirit Beast” monster in addition to your Normal Summon/Set. (You can only gain this effect once per turn.)
Reijuu no Aiban / Bond with the Spirit Beasts
(1) Banish 2 face-up “Spirit Beast” monsters you control; Special Summon 1 “Spirit Beast” monster from your Extra Deck, ignoring the Summoning conditions.
Reijuu no Renkei / Combination with the Spirit Beasts
(1) If you control a “Spirit Beast” monster: Destroy any number of monsters on the field, up to the number of “Spirit Beast” monsters you control.
Also the set comes with reprints of Blackwing – Gale the Whirlwind and Blackwing Armor Master
Source: Maxut / Starlight Sokuhou