Reverse 1999 37 build: Skills analysis, best Psychubes, Insight Materials, and teammates

37 debuted in the Reverse 1999 version 1.4 update, appearing as one of the central characters in the latest Chapter 5, The Prisoner in the Cave. Timekeepers can summon her from the banner, Beyond the World of Matters. The Star Afflatus Arcanist has DPS, Support, and follow-up tags and is of 6-star rarity. 37’s Star Afflatus makes her weak against Plant and strong against Mineral-type foes.

She also has a unique gameplay mechanic, Eureka, which enables her to cast follow-up attacks. This article provides the best Reverse 1999 37 build, helping Timekeepers use her kit optimally. It discusses the best Psychubes and teammates and provides an in-depth skill analysis.

Before delving into the most suitable Psychubes and teammates for the best 37 build, let’s understand her skills and their effects. Listed below are the details of 37’s skills in Reverse 1999:

Triangulation (Basic): Triangulation is 37's one-target attack that deals 140%/210%/350% Mental damage with one/two/three-star cards. 37 also inflicts 40%/60%/100% of her attack as Genesis damage with one/two/three-star cards.

Curve Mapping (Basic): It is a mass attack that inflicts 70%/105%/175% Mental damage and 40%/60%/100% of her attack as Genesis damage upon two enemies. 37 also gains a stack of Sturdiness with one and two-star cards, and two additional stacks with a three-star card.

Kingdom of Geometry (Ultimate): 37’s Ultimate mass buffs all allies, granting two stacks of Numeral Perception. It also gives two stacks of Enlightenment and two Eureka to 37.

The Ultimate can only buff her teammates; however, Timekeepers can leverage Eureka to cast her follow-up attack. Once Eureka stacks up to five times (indicated by a separate bar above her in battle), 37 spends all to cast