You can transform yourself into the form of a constrictor snake or a giant constrictor snake. This invocation is a polymorph effect. It lasts for a number of hours equal to your level, or until you choose to dismiss it as a swift action. While in snake form, you retain your mental ability scores and your ability to speak. Additionally, for the duration of your snake form, you gain temporary hit points equal to twice your caster level and can use hypnotism at will as a spell-like ability.