I have ALMOST - but not - lost my blade for Ignition twice.
That was enough to make me realize it is a good idea to get a backup blade while they are still available.

This is a great trick and better than the pen through note - just need to ensure the quality of the blade so that the gimmick is exactly straight with the master key otherwise it can be noticed on the set of keys deliberately put in view casually. Need to be far enough away so that the spectator does not reach out to touch the blade too! Getting the gimmick to connect with the key at the moment of ''penetration'' needs a lot of practice - I missed once and messed up the performance. Lastly, the last stage of freeing the key from the note is supposed to make a natural tearing noise but I don't hear it well even if I swipe the key off the note - I have to make the sound up myself which is a shame.

Just got the Ignition trick. Fantastic and unbelievably easy to learn and perform. And it's always on you! Nice to see this is available. This is definitely going on my next order.

***Note: If you lose or damage the caribiner, you can pick one up at Walmart in the camping section for about $1.

Finally you can buy just the blade, I have lost the blade twice o.O so great that I can buy this, love this trick and performe it all the time.