After a little while, Fithakk nailed that Friday's game was indeed Magic: The Gathering. A little more prodding on my part got Zombie Jesus to recognise that the art in question was specifically from the MicroProse adaptation of MTG, fondly known as Shandalar.
Wouldn't it be nice if Wizards just remade that game, even on mobiles? Good God they'd make so much money.
Anyway, new week, new game. Good luck!