Rare Summon(s)

You're entitled to a special promotion if you attempt to do a Rare Summon for the very first time. It is at a highly discounted rate - 70 gold coins vs. 300 gold coins.
[The intention, is none other than, to tempt you into purchasing more gold coins to perform Rare Summon(s)!]

Special Summon, Rare Summon and Bell Summon are the only avenue for you to try your luck in getting your hands on some rare and powerful daemons.

Note:
- Special Summon: Free
[How to get: Invite friends (use your Invitation ID) to play the game together or complete a Chapter in the Story mode to 100% progression for a Special Summon ticket.]
- Rare Summon: 300 gold coins; 70 gold coins on first attempt
- Bell Summon: 980 gold coins

I summoned this Phantom daemon, Otsuyu, who is transmigrate-able, on my very first Rare Summon. She has very high attack (after transmigration) for a 4* daemon. Her defense, however, is considered rather low.

Otsuyu's daemon-ic transmigration: (left) Otsuyu, original form; (right) Otsuyu, ultimate form.

Otsuyu's profile (left) before and (right) after transmigration.

Otsuyu (ultimate form)'s profile (see screenshot): 

Skill Effect: Reduces opponent's Anima Defense (-20%).

All in all, Otsuyu is meant to be placed solely on the Attack Team. She is an extremely useful daemon and is still being used on my Attack Team now. :)

~ Loves, Ayumi-san :)