When the rune is first used, the Shadowhunter may experience sensory overload. Once they learn to focus and grow accustomed to it, they will be able to effectively filter out everything unimportant and hone in on the heat signatures.
- ↑ Shadowhunters 2x04: Day of Wrath
- ↑ "It's kind of a Heat + Vision combo. Hence, heat vision!" Taylor Mallory on Twitter