Carl's last levitation potion, pushed to its limit to launch him out of Larracos for the bomb drop.
Carl pulled the final levitation potion in his inventory at the railing in Larracos, drinking it as dozens of Zarogoths reached for him. He shot straight up, pushing what he calls a dangerous-as-fuck spell to its limit.
The apex of the spell carried him up and out of Larracos, leaving him hanging in the funnel with a good hundred meters between himself and the edge of Shanty Town — the vantage from which he emptied his Shit Just Hit folder before switching to Walk on Air.
Not described; its effect is a straight vertical launch.
The consumable that gets Carl airborne for the bombing run.
Also appears in books you've already read — spoiler-safe to their endings: