pf2e.fyi
From Pathfinder Lost Omens The Grand Bazaar, which isn't enabled.

Directed Poison

FEAT 12
ARCHETYPE
Archetype Spell Trickster
Prerequisites Spell Trickster Dedication; ability to cast cloudkill

When you cast Toxic Cloud, modify its duration to be sustained up to 1 minute, and modify its standard effect to include the following: The cloud doesn't move away from you each round. Once per round when you Sustain the Spell, you can move the cloud 10 feet in the direction of your choice.

Pathfinder Lost Omens The Grand BazaarOGL