There seems to be no end to the mathemagical things one can explore with a simple deck of cards, from algebra and combinatorics to probability and statistics. In this exclusive talk given at Queen Mary University of London, Professor Colm Mulcahy surveys a wealth of recent material, mostly drawn from his upcoming AK Peters book on the subject. Two special features include "The Father Ted" card trick, and examples of "two-person mathemagic," in which communication is done via nontrivial pre-agreed mathematical conventions. Colm uses mathemagic to stimulate general interest in mathematics and to liven up many mathematics classes. His mathematical interests are broad, and he is a recipient of the Mathematical Association of America's Allendoerfer Award for excellence in expository writing on wavelets. He blogs at the Aperiodical and the Huffington Post, and tweets at @CardColm.