One Round Spells include (but are not limited to) spells used to perform Assist, Obstruct, Remove Drawback, and Aid Actions. Examples include spells that improve a character’s Action Score (such as a spell that makes the target stronger), add or remove a modifier (such as a spell that makes the ground slippery with grease), or temporarily alters the form of something (such as a spell that opens a hole in a stone wall). One Round spells last from the moment the spellcasting is completed to the beginning of the Spellcaster’s next Turn. At that point, the magical effect fades, and the world returns to its previous state.