Not A Bug Assimilation Aegis

[fatkidpaladin]

Game ID

Event # 279788832
Game 3 #921854518

Event # 279788832
Game 3 #921854518
I played an Assimilation Aegis and targeted Primeval Titan. Then I moved the Aegis onto a cloaked creature (who was equipped with a Cryptic Coat). The Mysterious creature did not become a Primeval Titan.

I have in many cases moved Assimilation Aegis to a new creature, and that new creature fails to become a copy.

 

[Neo001992]

This is not a bug, but a weird quirk of face down creatures.

• 708.10. If a face-down permanent becomes a copy of another permanent, its copiable values become the copiable values of that permanent, as modified by its face-down status. Its characteristics therefore remain the same: the characteristics listed by the ability or rules that allowed it to be turned face down. However, if it is turned face up, its copiable values become the values it copied from the other permanent. See rule 707.3.

• 707.3.The copy’s copiable values become the copied information, as modified by the copy’s status (see rule 110.5). Objects that copy the object will use the new copiable values.
  Example: A face-down Grinning Demon (a creature with morph) becomes a copy of a face-up Branchsnap Lorian (a 4/1 green creature with trample and morph {G}). The Demon’s characteristics become the characteristics of Branchsnap Lorian. However, since the creature is face down, it remains a 2/2 colorless creature with no name, types, or abilities, and no mana cost. It can be turned face up for {G}. If it’s turned face up, it will have the characteristics of Branchsnap Lorian.
  Example: A face-down Grinning Demon (a creature with morph) becomes a copy of Wandering Ones (a 1/1 blue Spirit creature that doesn’t have morph). It will be a face-down Wandering Ones. It remains a 2/2 colorless creature with no name, types, or abilities, and no mana cost. Its controller can’t turn it face up as a special action. If an effect turns it face up, it will have the characteristics of Wandering Ones.