True ethereal is an extremely rare unit ability that also confers the effects of regular Ethereal and offers an additional chance to negate damage from a non-Astral source. Against non-magical damage, this is also applied to damage that succeeds the first 75% chance to bypass regular etherealness.

For example, a unit with 50% true ethereal would require a non-magical hit to pass ethereal (at a 25% chance) and then another 50% chance to bypass true ethereal, resulting in only a 12.5% chance of landing.

Currently, all attacks with melee weapons are considered to be from an astral source, rendering this ability completely ineffective at negating damage from them compared to regular etherealness. It is unknown whether or not this is intended or a bug.

The only units in the game to have this are the Legion of Gods (50%), and both the second (50%) and third form (75%) of Umor - Eater of Gods.