Dungeons & Dragons spells

Ray of Frost is a Level 0 spell or cantrip from D&D. It does 1d3 damage, which is supposedly not the main aim of the spell; the illustration that goes with it shows a mage freezing a flower with it. (As far as I can tell, the only point of this is to stop you freezing small defenceless objects with Prestidigitation, another cantrip which can produce any minor effect not covered by another spell.) Ray of Frost is at its most entertaining when used on a small puddle of water just in front of your enemy's feet... this appears to be its one practical use.