Talent trees: points, rows and keystones

How talent trees work in The Ember Depths 0.20: where points come from, class and subclass trees, keystones and capstones, mastery gates and Recommended.

Version 0.20 changes how a hero grows. Feats are gone, and in their place every class has talent trees that change how its skills play. Past level 20 your Legend levels now fill a board of your own, with Crests that grow as you clear charts. And in a party, a hero can take a role: tank, healer or damage.

Talent points

You earn a ★ point at every level from 2 (19 of them) and a bonus point the first time you fell each act's boss (5): 24 points by level 20. Banked points never expire.
Every class has a class tree and, once you choose a subclass at level 3, the tree of that path. Across 14 classes there are 722 talents, and no hero can take them all.
A row opens once you have spent the points it asks for in that tree. Each tree has a keystone row and a capstone row where you take only one talent: they are the heart of the build.
A talent needs its skill learned, and some need that skill at a certain mastery rank. Use a skill and it ranks up; rank it up and the talents that love it open.
Most talents change how a skill plays (Cleave sets foes Burning, Whirlwind drags enemies in, a block taunts the foe that hit you). The talent card shows what changes before you learn it.
Recommended spends your points along a suggested path for your subclass and role. Undo takes back your last pick for the rest of the town visit.
Ability Score Improvements stay. They now apply themselves to your class's suggested spread, and you can change them until your next run.