Chill removes multiple boons, and deals damage.
You instead of using the warhorn, you get rid of the part of the movement, and instead have the signet of locus, meaning you got better boon stripping for higher tier fractals.
Here is my list of characters i got so far:
Elementalist 80 with tempest:Talman nul
Necromancer 80 with reaper:Zex vokar
Mesmer level 80 no chrono yet:Klanga voosh.
Level 80 Ranger with druid spec Jedkhan.