Firm Friendship Ring

Firm Friendship Ring (Korean: 견고한 우정 반지, gyeongohan ujeong banji, "Sturdy Friendship Ring") is a POWER+ Epic Treasure released alongside Squid Ink Cookie during the Black Sugar Pirate Ship update. It had the ability to grant the player a certain amount of Crystals and Coins upon log-in, alongside giving two players running in Friendly Run an extra Coin per Gold Pirate Coin collected.

Effect
Provides Coins and Crystals upon login and +1 extra Coin per Gold Pirate Coin in Friendly Run. The effect applies to both players. If both players own this Treasure, the effect doubles. Reach Lv. 12 to receive +2 extra Coins. (Effective until September 1, 2019)
 * Standard: 100 Crystals, 50,000 Coins upon login (% chance), +(x) Coin(s) per Gold Pirate Coin in Friendly Run
 * Enhanced: ???

Description
''This ring was created to commemorate someone's friendship. Do you think the friends still remember about the ring...?''

Changelog

 * August 30, 2018
 * Added to the game.
 * September 1, 2019
 * The Treasure has expired and its effects were removed.

Trivia

 * Alongside True Friendship Pendant, this was the first POWER+ Treasure (or indeed, POWER+ anything) to be added into Cookie Run: OvenBreak.
 * This remains the only instance where a POWER+ element was ever introduced.
 * Alongside True Friendship Pendant, this was the first Treasure to be given an expiry date.
 * This Treasure appears in a cutscene for the The Treasure and the Crow story.