Merlin's Lost Ace Trick

Great effect that you can do with a borrowed deck and requires no setup other than pulling out the four aces at the beginning to show them. There is a little bit of work ahead of you to learn the sleight necessary to pull this off, but it's something most card workers will have at least a little experience with already. In the end, you have a beautiful effect that leaves you clean at the end with no gaffs like other similar versions.

This is a really great trick! The sleights may be intimidating to a beginner but aren’t so when executed at the pace Mr. Kopf has set. If performed (and I mean performed) correctly it’s very magical. This is a performance piece not a card trick. This trick will teach you a very subdued style of audience management and the equivoque process will be something in your tool box you will utilize for life.

As ace assemblies go, this one is a corker. It'll take some time to learn as the sleights are not particularly easy. But I feel that just makes it a perfect practice piece. You'll (slowly) learn a great effect and perfect some of the harder sleights in the process. Then you'll have an outstanding piece of magic to add to your repertoire.
You actually get 2 videos of instruction so be sure to download them both.
I originally asked a question about this video that got deleted, so I'll answer my own question in the hope it benefits others:
The copy states that this is, "Jared's version of Merlin's 'Lost' Ace Trick from Expert Card Technique" and I wanted to clarify that. Mr Kopf teaches the same version of the effect that you'll find in ECT with a slight variation in the handling of the main sleights. He also includes his own handling of the final part of the trick which Hugard & Braue leave to the individual anyway.
I hope that makes sense.

Fantastic effect. Clearly described tutorial but there are a couple of moves that are mentioned and assumed to be learned elsewhere.

Jared Koppf is not only an expert cardician, but he's just as versed as a teacher. Merlin's Lost Ace Trick is the trick to learn to take you from crayons to perfume!

I love this effect. It's super easy to do and leaves a major impact! You just have to practice certain types of deals. Once you do you you have something truly amazing.