Sentinel Neithar

Neithar has Advantage on saving throws against spells and other magical effects.

Neithar is immune to all spells and effects created by or originating from Divine Relics, except for the Hand of Brass.

Neithar can be affected by all spells and effects that originate from the Hand of Brass, even if it would normally be immune to those effects. Additionally, Neithar automatically fails any saving throw against any spell or effect originating from the Hand of Brass.

Neithar's construct contains only 50 gp worth of amber within its body. These small motes of fractured amber are scattered throughout its frame, embedded too deeply to be removed. With so little amber, it is considered Incapacitated and cannot speak, though it could move if it wasn't chained to the wall.

Neithar cannot recover lost Hit Points on its own. If a creature attuned to the Hand of Brass dedicates an hour during a Long Rest to channel the relic's magic into the brass sentinel, Neithar will regain all of its lost Hit Points by the end of the rest.

When Neithar is reduced to 0 Hit Points, it perishes in a blinding flash of light that deals 36 (8d8) radiant damage to creatures within 10 feet of it. An affected creature can make a DC 15 Constitution saving throw to halve the damage. As part of the explosion, all the amber that fueled the construct is destroyed, and the soul that inhabited it is consigned to oblivion, permanently destroyed.

The brass sentinel makes two attacks with its claws.

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 4) slashing damage. These claws count as adamantine for the purposes of bypassing resistances.