Rune of Flame

An interesting spell, Flame Rune creates a floating, glowing "Flam" rune. It might look harmless on first sight. However, touching it causes the person foolish enough to do so to be burned rather seriously by an enormous heat, causing death to lesser foes. This of course also makes it a dangerous obstacle for the mage.

The only two ways to get rid of this rune are either to cast Dispel Rune or throw an object at it, which most likely will be destroyed in the process.

A different rune that can be conjured is the Paralysis Rune. 

Trivia

 * Surprisingly, the best way to get rid of such runes is, to throw coins at them. Since coins don't have a damage system, collision with the rune won't do anything to them. This makes the spell Dispel Rune pretty useless in the process.