Hold G (from Qi Condensation). It costs 1 Qi per second and reaches 16 blocks in your line of sight. The screen's edges turn blue and a seal appears above each being:

• Weaker: its realm and exact stage.
• Same realm: the seal, its stage flickering.
• One realm above: a smudged seal.
• Two or more above: a dark swirl, and your view shakes when it is close.

Mob realms: Armored Crab Qi Sensing Early, Mountain Bandit Middle, Crab Man Late, Bandit Chief Qi Guiding Peak.

By default Epic Fight's lock-on is also on G: change one of them in the controls.