All Bosses in Rubinite Explained

Rubinite's demo introduces two of its bosses directly: The Beast and Guardian Faye, both built entirely around the Focus mechanic — hold Focus to reveal their hidden Pure Blood Crystal weak point, then land a Critical Thrust once you've stacked marks.

Beyond the 8 main story bosses, two optional Blood Recipients — Ghost and Roy — round out the full roster of 10 encounters, plus a phase-3 gauntlet of mimic fights for players chasing full completion.

Since Blood Dust survives even failed attempts (reaching half health on a boss still pays out), there's no wasted effort in repeated tries — use early losses to fund Talismans before your next attempt.

See the full data: Rubinite Bosses