The Aphthartodocetae (Greek Ἀφθαρτοδοκῆται, from ἄφθαρτος, aphthartos, "incorruptible" and δοκεῖν, dokein, "to seem"), also called Julianists or Phantasiasts by their opponents, were members of a 6th-century Non-Chalcedonian sect.
"[2] Severus asserts that such a doctrine where Christ only appears to have suffered places mankind "unavoidably...under the servitude of death...redeemed by nocturnal hallucinations and not in reality by the blood of his cross.
"[4] Elsewhere, Severus summed up Julian's theology as follows: This foolish man, who confesses the passions with his lips only, hiding his impiety, wrote thus: 'Incorruptibility was always attached to the body of our Lord, which was passible of His own will for the sake of others.'
And in brotherly love I wrote and asked him : 'What do you mean by "incorruptible," and "suffered of His own will for the sake of others," and "was attached to the body of our Lord," if without any falsehood you confess it to be by nature passible?
[2] In 564, Emperor Justinian I, who was in his 80's and had already reigned for almost 40 years, adopted the tenets of the Aphthartodocetae and issued an "edict compelling assent to the notion that the body of Christ was 'incorruptible and not susceptible to the natural and blameless passions,'”[6] (i.e. suffering) and attempted to elevate their beliefs to the rank of Orthodox dogma.