With training, each character can learn to
meditate over the course of a short rest with
an open flame.
At the end of the short rest, a character
gains the ability to use and redirect fire. In
addition to being able to use the control flames
cantrip, a character can also control more
violent flames to reduce incoming damage.
As a bonus action, a character can spend any
number of d6 from a pool of 10d6 to reduce
incoming fire damage to a minimum of zero;
this pool is replenished when a short or long
rest is completed within sight of an open
flame.