I recall playing with a multi-phase card warp effect with multiple tears which is examinable at the end...
What exactly do you mean by "examinable at the end"? Do you mean that the specs can hold and examine the pieces after you tear the cards up or that the specs can hold and examine the warped card in a somewhat "intact" state at the end of the routine?
The reason I ask is that most Card Warp routines end in the former state, i.e., the specs are left fiddling with th epieces of two ripped up cards. There is only one that I know of which involves "multiple tears" and ends with the performer handing out the warped card without ripping it in half. It happens to be one of the the versions I regularly use.
Can you describe the ending in a bit more detail?