Chainsaw needs to be turned into a gap closer.

You call down (like the Automaton Queen) a MASSIVELY OVERSIZED CHAINSAW that you are unable to properly lift and therefore drop, which then chews up the ground in front of you as you're dragged over to and collide with the target, damaging anything along the way, and in a line behind the target after your grip slips from the impact and it is let loose.

Its current incarnation isn't even a proper chainsaw, just 3 circular saws frisbeed at your target with zero chains involved.