Eldritch Invocation: Fathomless Conjuration

Call of the Deep.  When you cast Evard's Black Tentacles, you can do so without requiring spell components. If instead you do provide the spell's components, that casting of the spell does not require concentration, lasting for the full duration or until you choose to end the spell (no action required).

Plunging Gate.  The range of your Fathomless Plunge extends to any distance, on the same plane of existence. If Plane Shift is selected as your Mystic Arcanum, the range of your Fathomless Plunge extends to any distance, including other planes of existence.