Big Head Mode (3.5e Spell)

''As he waved his hands up and down and left and right, he shouted a final command of "beeaystart". Those around him grew comically enlarged heads, while their bodies shrank just a bit to complete the effect.''

This spell warps the target's bodily proportions out of whack. The subject's head enlarges while its body mildly diminishes. Thankfully, worn gear changes shape to compensate. Having an oversized noggin amplifies the subject's senses and allows the subject to re-roll Spot and Listen skill checks each once per round. Unfortunately, it also makes them awkward and causes them to suffer an additional 4 to their armor check penalty as well as suffering a potential head loping from all vorpal weapons on dice rolls for attacks resulting in 19 or 20.

Big head mode can be made permanent with a permanency spell.