Otherworldly Leap is an Eldritch Invocation from the Warlock class. You can cast the 
spell without expending a Spell Slot.
Description
You can cast Enhance Leap as a ritual spell out-of-combat, but it does expend a Warlock slot to cast in turn-based mode.[1]
How to learn
Classes:
- Class level 9: Warlock
- ↑ As of 4.1.1.3748643. This may be a bug.