Didn't get a photo of it, but after buying the 20 cards needed to unlock the Illusion voucher, the game doesn't seem to register it until a hard reset of the game. Not a bug problem but a minor inconvenience at least, as it doesn't seem intentional.
#Problems unlocking Illusion
ebon ruin
olive timber
Only cards bought in unseeded runs will actually count towards unlocking the illusion voucher. However, for some reason, buying cards in seeded runs will increase the counter that you can see.