Humanoid Essence(Races of Eberron, p. 186)
Level: Artificer 4, Cleric 5,
Components: V, S,
Casting Time: 1 standard action
Target: Creature touched
Duration: 1 round/level
Saving Throw: Will negates
Spell Resistance: Yes
As lesser humanoid essence with the following additional effects. The construct becomes subject to critical hits, sneak attacks, nonlethal damage, stunning, ability damage, ability drain, death effects, and necromancy effects. In addition, a warforged affected by this spell loses its racial fortification against critical hits and sneak attacks (including any improvements to that fortification).
This spell counters and dispels lesser construct essence and construct essence. If this spell is cast on a creature under the effect of lesser construct essence, the latter spell is automatically ended. If this spell is cast on a creature under the effect of construct essence, both spells are dispelled and have no effect. It has no effect if cast on a creature under the effect of greater construct essence.