Grapnel LauncherYou have built a grapnel of your own design, perfectly balanced for your use. You can use it to move vertically 10ft during your normal movement, and during combat you can substitute a melee attack with reach 10ft to attempt to push, pull, or trip the target. Use the shoving rules here (https://roll20.net/compendium/dnd5e/Combat#toc_44) but substitute dex(acrobatics) for str(athletics) for your attack. When pulling a target, it does not provoke opportunity attacks from you, but might from other creatures.
I'm contemplating making this feature scale with levels, but it needs more playtesting before I make that call.