he scurries off into the open cell and digs through the hay, coming back a few seconds later, holding a corked glass vial containing an opaque yellow liquid.
OOC:
Potion of Rat Control:
When you drink this potion, you can force a rat to serve you. As
an action, you can force a rat that you can see within 30 feet of
you to make a DC 15 Wisdom saving throw. On a failed save, the
rat is under your control for the potion’s duration, or until you
choose to end your control over it. Rats with an Intelligence of 5
or greater (like Nibbles) are immune to this ability.
On each of your turns, you can use your action to mentally
command a controlled rat, deciding what action the creature
will take and where it will move during its next turn. If you issue
no commands on a turn, the creature does nothing.
You can only control one rat this way at a time. If you take
control of a rat while already controlling one, the previous
controlled rat becomes free-willed. The potion lasts 6 hours.
