Lucky Letters Raffle

"One day, the prince received a delivery containing a letter and a sealed envelope from Ieyasu and the others in Hinomoto. The letter described a year-end Hinomotoan tradition that involved sending lucky letters to those you received favor from during the year as a way to thank them and share New Year's greetings.

According to the letter, the envelope was one such lucky letter, and it contained a paper with writing on it that would bring one of seven blessings to those who were worthy. But it also contained a warning, stating that if you read the blessing written on the paper immediately, then it would disappear, taking all of the blessings you would have received in the new year along with it!

What could possibly be in the lucky letter the prince and friends received? Suppressing the urge to open it right away, the group eagerly awaited the start of the new year!"

The Lucky Letters Raffle is an annual item-distribution event to commemorate the New Year. It was first held in December 2019.

Overview
The event is split into two parts: the distribution period and the raffle period.
 * During the distribution period, players can collect a limited amount of s from various sources, such as Login Bonuses and event endeavors.
 * In the 2019 iteration, the maximum amount of letters available was 19.
 * In the 2020 iteration, the maximum amount of letters available was 14.
 * During the raffle period, logging in will immediately redeem all of the player's lucky letters for prizes.

Rewards
Each lucky letter is assigned one of the following prize tiers:
 * First Prize
 * Second Prize
 * Third Prize
 * Fourth Prize
 * Fifth Prize
 * Sixth Prize
 * Seventh Prize

Additionally, if the player possesses more than 10 lucky letters, the tenth letter is guaranteed to be a Fourth Prize or better.

When a prize is received, the item rewarded is picked from one of 5 possibilities, depending on the rank of the prize.