Door
Who is Door?
Door is a 2-star Intellect-afflatus Support built entirely around a self-sacrifice mechanic. His Ultimate, To the Universe in the Alley, instantly kills Door; in exchange, all other allies receive Moxie +2, a substantial Shield, and 2 rounds of [Inspire] — which grants Moxie +1 at the start of each round. This makes him an extremely cheap burst Moxie injector for teams that need to fuel multiple Ultimates simultaneously. As a 2-star, he requires almost no investment; Insight I is the only upgrade worth pursuing.
Kit Summary
To the Universe in the Alley (Ultimate — self-sacrifice): Door instantly dies; all allies gain Moxie +2, a Shield, and 2 rounds of [Inspire] (Moxie +1 each round start) — massive team-wide Moxie injection at the cost of losing Door.
Weak Intellect-afflatus attacks with no notable secondary effects; all value is concentrated in the Ultimate.
Build Guide
🔮 Best Relic / Echo Set
No investment recommended beyond Insight I. HP resonance if any is applied, to survive long enough to cast the Ultimate.
⚔ Best Light Cone / Weapon
Any low-cost budget psychube is acceptable — Door's value is entirely in dying for his Ultimate, so psychube choice is irrelevant in practice.
📊 Substats Priority
👥 Best Teams
Burst Moxie setup: Door + high-cost Ultimate carries — sacrifice Door on turn 1 or 2 to instantly flood the team with Moxie, enabling back-to-back Ultimates from the carries.
F2P Verdict
Available from the standard gacha pool at 2-star rarity. One of only two 2-star arcanists in the game. Costs almost nothing to build; Insight I is the only recommended investment.
Frequently Asked Questions
Does Door need to be kept alive?
No — his entire kit is designed around dying via his Ultimate. His incantations are irrelevant; the goal is to reach Ultimate as quickly as possible and sacrifice him for the Moxie and Shield payoff.
How much Moxie does Door's sacrifice generate?
All allies receive Moxie +2 immediately plus 2 rounds of [Inspire] (Moxie +1 at the start of each of those rounds), for a total of up to Moxie +4 per ally over the following two rounds.