Advancement

As dogs go on adventures, they become more experienced and powerful. This indication of experience is called a level, and increasing in level is called advancement. Dogs go up in level after an interesting story or two, or maybe every few sessions — it varies based on Guide desire and the logic of the chronicle. It may make more sense to go up in level when the characters are relaxing in Pugmire instead of when they’re in the middle of exploring a ruin. Conversely, defeating or outsmarting a particularly powerful monster may prompt a level advancing immediately.

After a dog reaches level 10, she is considered an old dog. She can continue to adventure if she chooses, but she doesn’t advance in level any more.

Advancement
At each level, the player does the following: level. This can be any of the following: At each level, spellcaster characters also:
 * Adds a number of stamina points to her dog’s maximum total, based on her character’s calling
 * Gains another stamina die
 * The character also gets one improvement each
 * Increase an ability score by 1 up to a maximum of 20. Also, take a new skill.
 * Take a new calling, breed , or aptitude trick.
 * Refine an existing calling or masterwork trick.
 * Every two levels, the character’s proficiency bonus also increases by one.
 * Gain two additional spell slots (plus another one if their Constitution modifier increases)
 * Choose one of the following:
 * Improve your spellcasting trick and can start learning spells at the next level
 * Take four more spells at the current spell level