The Secret Crane Princess Who Returns A Favor - Constellar / White Forest

The Secret Crane Princess Who Returns A Favor is a board breaker as a DM. The main combo is Constellar Tellarknights by using Tellarknight Constellar Caduceus with two level 4 monsters, but alternatively, the deck can use the Fiendsmith combo. The best starters are the White Forest cards, which end on the strongest boards. This deck could also be built focusing on Winged Beasts, but I found them a lot worse, so I only included a small package with Painful Choice.

One interesting tip is that you can use Ultimate Offering to break boards multiple times over the course of multiple turns (or in the same turn). You can set it with Knightmare Gryphon co-linked with Fiendsmith's Requiem. To send it to the graveyard, you can use Beatrice, Lady of the Eternal, or a Painful Choice search by Verre, the Maid of Endymion, and return it with Diabell, Queen of the White Forest.

Main Deck Alternatives:

Child's Play: Good if you plan to use Ultimate Offering multiple times.

Constellar Sombre

Skill Drain, Imperial Order: Floodgates to set with Knightmare Gryphon (searchable by Painful Choice). 

Pot of Avarice, Pot of Acquisitiveness

Double Summon: Any extra Normal Summon effect is another chance to combo or to break boards.

Extra Deck Alternatives:

Stellarknight Constellar Diamond

Silvera, Wolf Tamer of the White Forest 

Cyber Dragon Nova, Cyber Dragon Infinity

Constellar Pleiades: With Constellar Castor as material, it's a bounce + spell negate.

Eclipse Twins 

Number F0: Utopic Future Zexal: Good alternative to Number F0: Utopic Future + Number F0: Utopic Draco Future.

Selene, Queen of the Master Magicians 

You may want to cut Number 16: Shock Master, Simorgh, Bird of Sovereignty, Knightmare Gryphon. It's also possible to cut the Fiendsmith package, but I do not recommend it.