Eldritch Invocation: Chains of Carceri is a Warlock feature gained at level 15 in D&D 5e. You can cast hold monster at will--targeting a celestial, fiend, or elemental--without expending a spell slot or material components.
You can cast hold monster at will--targeting a celestial, fiend, or elemental--without expending a spell slot or material components. You must finish a long rest before you can use this invocation on the same creature again.