I've been wondering about the following scenario: Our party is moving through a dungeon and comes upon a wall of fire. To proceed, we need to pass through. Dispelling does not work and we have no wish spell or antimagic field.
Say my Warlock makes a running jump through the wall, triggering Tomb of Levistus to negate much (if not all) of the damage. The invocation itself says: 'your speed is reduced to 0'.
Does that negate the ongoing momentum of the jump, causing the warlock to come to a halt?
Or can the momentum from the jump carry him completely through the wall of fire?