Allowed Varatus to use Fire Bolt to burn his way out of a net

At level up, you can take the average for your HP or you can roll in front of the DM only to try and get better than the average, but once you roll, you're stuck with it.

Logan is only allowed to kill a monster in the groin once per session.

We're not going to use the DMG's optional flanking rule

Casting a spell within attack range does not trigger Attack of Opportunity¹⁾