Shield of Vanity is a nifty little spell that lets paladins, bards, clerics, and even artificers temporarily enchant their shield to be extra bright and shiny, and even a bit more magical! The reflective surface, when pointed at your foes, shows them a grand vision of themselves, encouraging feelings of jealousy and overconfidence that drives them to attack the bearer of the shield. Or maybe they just want it for its shininess!