An Idea for a "Tracking" mechanic in the Rengar rework

Whenever a champion uses a movement ability or makes a change in direction, they leave a footprint for ~30 seconds, which faces the direction they started to move in.

(How would floating champions leave footprints? Good question. Shhhhh)

If Rengar hits an enemy champion with his Q, they will bleed. This causes them to take minor magic damage over 10 seconds, but more importantly causes them to leave a trail of blood that Rengar can use to find their location.