Thelthrun's Column of Text

You write a word or symbol on your spellbook, and a column emerges from the ground shaped like what was written, rising to 15ft in height or until it touches the ceiling. You can cast this spell if you have sight on a creature thats within 30ft of you or on an unoccupied space. The coloumn occupies a 5ft area. If a creature is standing on top of the selected area, it must make a Dexterity Saving Throw to leap from it before it rises. On a successful save, it takes no damage. If the creature decides to leap from it at maximum height it must take 1d6 bludgeoning damage and fall prone. When inside an enclosed space where the ceiling is less or equal to 15ft tall the creature must make a Dexterity Saving Throw to leap from it before hitting the ceiling. On a failed save, it takes 3d6 force damage and become restrained until the spell is dismissed or on an successful Strength Saving Throw on the beginning of its next turn. On a successful save, it leaps from it before hitting the ceiling, taking no damage instead.