From Dungeons of Dredmor Wiki

Damage: 4 +0.15 & Midas (Effect)

Midas is a spell that, in addition to the damage it does, also causes Zorkmids to fall from the affected target.

It is a side-effect of spells cast by characters with the Mathemagic skill tree, by quaffing a Solution of Gold or Potion of Midas or triggered by a Blingmine. It can also be found as a weapon enchantment, and is cast by the Golden Golem 25% of the time on hitting the character.

[edit] Trivia

• The name of this spell is a reference to King Midas.