The Memory of Cintamani is the head ornament of The Golden Armor set.
The effects of the item are currently unknown.
During the PvP Round Semifinals, Hardcore Leveling Warrior stated that the item would give him access to all the 999 skills he had access to when he was the Rank No.1 Player.
Hardcore Leveling Warrior called this the most important item he had when he was the Rank No.1 Player.
At some point before the PvP Round, Heart Heater bought The Memory of Cintamani form a wanderer. 
'여의주의 기억' literally translates to "Memory of yeouiju" . Yeouiju is the Korean pronunciation of the Chinese word ruyizhu (如意珠) (lit. "as-one-wishes jewel"). Ruyizhu is the Chinese translation of the sankrit word, Cintāmaṇi, which means "Wish-Fulfilling Gem" . So ultimately, 여의주의 기억 means 'Memory of Cintamani' or more literally 'Memory of Wish-Fulfilling Gem".
Line Webtoon correctly translated this as 'Memory of Cintamani' in Episode 1. However, they have since called it 'The Memory of the Dragon Pearl' since Episode 143. The reason for this is most likely because in Korean mythology, a Korean Dragons are depicted carrying the Yeouiju (this is explained in more detail in the Notes & Trivia section).
Ultimately, this wiki will always go with the true and original meaning, so 'Memory of Cintamani' has been retained.
Notes & Trivia
- Cintamani is a jewel within both Hindu and Buddhist traditions. For more information please see the Mythology sub-section below.
- According to Hardcore Leveling Warrior, it was and still is the most important item he had when he was the Rank No.1 player.
- It is possible that this wanderer is Novelist Han due to his habit to wander around in order to complete his novel about Lucid Adventure and the fact he once gave the frog merchant a Ego Sword which ended up in the hands of Sora
Cintāmaṇi (Sanskrit; Devanagari: चिन्तामणि): 'Wish-Fulfilling Gem' (Tibetan: ཡིད་བཞིན་ནོར་བུ, Wylie: yid bzhin norbu)
The mani (jewel) is translated in Chinese ruyi or ruyizhu 如意珠 "as-one-wishes jewel" or ruyibaozhu 如意寶珠 "as-one-wishes precious jewel". Ruyibaozhu is pronounced in Japanese nyoi-hōju or nyoi-hōshu 如意宝珠. Ruyizhu is pronounced in Korean yeouiju 여의주
Cintamani (Korean:여의주, romaja: yeouiju) is a mythical wish-fulfilling jewel within both Hindu and Buddhist traditions, said by some to be the equivalent of the philosopher's stone in Western alchemy.
In The Digital Dictionary of Buddhism's ruyizhu, it is said that a 'maṇi'-jewel (or magical jewel), which manifests whatever one wishes for (Skt. 'maṇi', 'cintā-maṇi', 'cintāmaṇi-ratna'). According to one's desires, treasures, clothing and food can be manifested, while sickness and suffering can be removed, water can be purified, etc. It is a metaphor for the teachings and virtues of the Buddha. ... Said to be obtained from the dragon-king of the sea, or the head of the great fish, Makara, or the relics of a Buddha.
The Korean dragon is very occasionally may be depicted as carrying the Yeouiju in its claws or its mouth. It was said that whoever could wield the Yeouiju was blessed with the abilities of omnipotence and creation at will.