I don't get it why if it is flipped face down with Canadia when you flip it up again it loses all it effects gained from the ritual materials (like Revenants). Also If you summon it with Evolution it is supposed to be destroyed at the end of a turn, but if flipped down it isn't Can someone explain?
When flipped face-down, it basically forgets anything that were applied to it back when it is face-up, because a face-down card essentially has no identity. It is treated as if no one knows what is it.