The eidolon vampire, better mind control frame than Nyx, what Caliban wished he was - Revenant!
Release date: 2018-08-24
Passive: When Revenant’s Shield is fully depleted, he emits a radial pulse over 7.5 meters inflicting 100 Blast damage with maximum 75% Damage Falloff.
Enthrall - Convert a target into a zealous thrall. Thralls turn on their allies and enthrall through damage. On death, they disintegrate into a damaging pillar of energy. The thrall horde remains under Revenant’s spell until this Ability runs out.
Mesmer Skin - Become enveloped in Sentient energy, which redirects damage and stuns all those who dare attack. Stunned enemies can be Enthralled at no energy cost.
Reave - Dash through enemies as a wall of Sentient energy, leeching shields and health from any encountered, enhanced for thralls.
Danse Macabre - Erupt with a multitude of Eidolon energy beams and sweep a circle of death around Revenant. The beams will modify their Damage Type to target select defenses, while incoming damage is redirected back into the beams. Hold fire to boost Status Effects and Damage, at the cost of increased energy consumption. Thralls killed by this leave overshield pickups.
Acquisition: Main blueprint is awarded upon completion of the Mask of the Revenant quest, which is unlocked after reaching Rank 2 - Observer with The Quills. Component blueprints are acquired from Plains of Eidolon Bounties.
I thought a bit about what I would consider the “best” Warframe boss in terms of design and I think it’s Exploiter Orb. It has the most build variety possible without requiring you to bring a necessary frame/weapon and without getting trivialized by one either. It mostly boils down to doing mechanics, but the way it mixes having to shoot the boss/killing adds to prevent them from cooling it allows for both tanks, CC and kill frames to work well. It’s also balanced so it can be done solo but more slowly, or in a group for a faster kill. My only issue with it is that the mechanics are not explained nearly well enough, I would’ve been lost on my first attempt if not for reading up on it’s abilities on the wiki.