☰ mtdb > Tricks > Trick< Back to all tricksThe Killer Observation Test Permalink: mtdb.co/?TheKillerObservationTest Creator: Paul Gordon Four blue-backed same-faced cards change into four/five different-backed cards, and oh, just try the darned thing and see for yourself how strong it is! It's a very powerful trick for laymen, but also totally FRIES other magicians! A lot of magic happens with so few cards and only requires average... Buy From: REVIEWS No Reviews Yet. about | login | register | dealers | tricks | creators | contact |