Actions

• Multiattack. The Alpha Enginseer may make three attacks. She may use Static if available.
• Vibroblade. Melee Weapon Attack: 1d20+10 to hit, reach 10ft., one target. Hit: 12 ( 2d6+5 ) piercing damage plus 10 ( 3d6 ) force damage. She scores a critical hit on a 19 or 20.
• Autopistol. Ranged Weapon Attack: 1d20+9 to hit, range 120 ft., one target. Hit: 10 ( 2d4+4 ) piercing damage plus 10 ( 3d6 ) ballistic (force/bludgeoning) damage. On a critical hit, the bullet continues on to the next target in a line up to 120 ft.
• Demiurge Static (Recharge 5-6). The Alpha Enginseer’s damage has inadvertently gifted her with a new ability. She can release an electronic wail consisting of electronic feedback. All other creatures within 30 feet of her that can hear her must make a CON saving throw. On a failure, a creature takes 20 ( 6d6 ) thunder damage and are deafened, half damage on a success and are not deafened. A defeated creature may repeat the saving throw at the end of its turn to end the deafened condition. On a natural 1 the target is deafened permanently as their eardrums are blown out and stunned until the end of their next turn.

Reactions

• Berserk Flailing. When the Alpha Enginseer has lost half of her starting hit points she immediately makes a vibroblade attack against each target within reach.
• Reactive Shielding. When struck by an elemental damage type (acid, cold, fire, lightning, or thunder) the Alpha Enginseer may use her reaction to reduce the damage by half. The Alpha Enginseer's next vibroblade or autopistol attack does an additional 1d6 damage of the energy type absorbed.
• Defensive Strike (Recharge 5-6). When an enemy moves adjacent to the Alpha Enginseer they must make a CON saving throw or take 3d6 psychic damage, and the robot makes a secondary attack against the same target with a round-house kick (treat as a vibroblade attack that does bludgeoning and radiant). If this secondary attack hits, the target is pushed back 25 feet, knocked prone and dazed until the end of their next turn.

Legendary Actions

Development. If at any time during the encounter the attackers try and attack from the corridor, the enginseer gains a legendary action for as long as there are targets in the connecting corridor. Her legendary action options are:

• No Kiting. The trap in the corridor resets and is triggered with a snap of her fingers. When the pulse is released, intelligent machines in the tube must succeed on a DC 15 Constitution saving throw or take 55 ( 10d10 ) force damage and become paralyzed for one hour. They still take half damage on a successful save and are paralyzed for one round. Living creatures who fail the same save take 27 ( 5d10 ) lightning damage, or half that if successful, and are not paralyzed either way. The trap may be disabled normally.
• Isolation Protocol. A hard-light bead drops from the top of the doorway, projecting a holographic door that appears at the entrance and persists until the fight end; it's destroyed or dispelled in some way. It acts as a prismatic wall.

Lair Actions

The Platinum Egg. The container that held the enginseer's light bead begins spinning. This is a trap. The room is bathed in white light as the crud begins to fall away from the egg, revealing the platinum underneath. All creatures in the room are attacked by the trap at the start of their turn. Each creature not in melee with the eginseer or a soft-light hologram must make a CON saving throw or take 2d6+9 psychic and radiant damage and the target teleports to a space adjacent to the enginseer. The enginseer may then make a melee attack against the target. The target is not teleported on a successful saving throw and takes half damage. The egg can be disabled with two successful Thieves Tool checks. If the check fails, the egg pulses and all creatures within 30 feet must make a CON save or take 4d8+9 psychic, and radiant damage, and the target is stunned until the end of its next turn.

The Enginseer [Encounter DC 18]

The Alpha Enginseer uses tactical combat. Battle map to the right. Once the enginseer is activated, the battle begins per the area and creature's description. Two additional things occur. The enginseer summons four angelic-looking soft-light holograms. Treat these creatures as Wraith that do radiant damage but with the following additional trait:

• Gift of the Machine God. As a creature of technology, the softlight hologram is immune to most physical attacks, though it is susceptable to fire, radiant and cold damage that affects the light bead that projects the hologram and force which interacts directly with the holographic body. Once reduced to half its starting hit points, its immunities become resistances, and she is more open to attack.

Timer. Each time the 1d4 timer is at one at the start of the DM's turn, the enginseer will duplicate herself and heal fully. The next timer has a -1 applied; this is a cumulative effect. This cloning can only be stopped (but not reversed) by disabling the Platnium Egg.

Suggested Environments

Technological