The source of Cyril's tricks? Everywhere.
I've seen him use effects from AoA (Paul Harris), marked card ones, and commercially-sold things like Prohibition.
Which version of Marked Card? Card Through Window, or? I'd love to check out. I've seen the Prohibition trick Cyril did, but he did it closeup and mostly on the spectator's hands very convincingly. I saw Prohibition on youtube, and the guy simply showed himself slamming the bent cap through the bottle's bottom at a distance. The bottle has too much printing on the outside and the trick doesn't look clean and convincing.
I have also seen clips of Night Shade performed by Cyril and others. While others merely showed a bill already having the shade drawn on the image, and then shook it to get the shade move up to the forehead, Cyril did it by first borrowing a bill from a spectator, and then drew the shade on the bill with the spectator watching. Next, instead of shaking, he pulled the shade up to the forehead with two fingers. Next, he used a tissue to press on the night shade drawing and the night shade drawing disappeared from the bill and was transferred on the tissue. He then burned the tissue and magically and instantly turned the ash into a pair of real sunglasses in his hand and put it on himself.
I'm not sure if such a commercially available Night Shade is able to do what Cyril did, or is there a separate package.