Idea for a piece of an anti-mobility kit: Maiev's Umbral Bind from HotS

Maiev was introduced recently in Heroes of the Storm as a bit of a hard-counter to high-mobility heroes like Tracer, Genji, and of course Illidan. Part of that is her Umbral Bind ability, which is detailed below.

Umbral Bind Maiev's next Basic Attack cleaves and applies a tether to enemy Heroes hit for 2.5 seconds. If a tethered Hero moves too far from Maiev, they are pulled toward her, dealing damage and breaking the tether.

This would be insanely strong against hyper-mobile Champions like Lee Sin, Ahri, Yasuo, etc. But it also features acceptable counterplay in that you can simply stay close to her and wait it out, or you could break the tether and then use your hyper-mobility. There's also the nuance that she has to hit you with that basic attack first, and Umbral Bind has a fairly long cooldown for an "on next AA" ability (said cooldown also doesn't cycle until you use that attack).

Could a variant of Umbral Bind be used on a future Champion? Maybe remove the cleaving effect, but keep in that tether.