Landmark advancement
Landmark Advancement is the process by which a character advances in their capabilities through means other than simple growth of skills. This is largely reflected in the growth of other Pools such as Hit Points.
When to do Advancement
Landmark advancement is meant to take place during major intermissions in the narrative of an ongoing campaign. It's not appropriate for use in single-shot play session, but instead should be handled between scenarios (or at least during key downtime interludes). A character becomes markedly more powerful during Landmark Advancement than they were prior to doing the advancement, so it is better to run this operation between scenarios rather than in the middle of one for gameplay balance reasons. It's also a major break in the narrative due to the required work.
Landmark Advancement thresholds are currently under development, but the general rule is that when a character reaches a given number of landmark advancement ticks they should do the landmark advancement operation at the next "good time". Alternative systems include ignoring landmark advancement ticks entirely and simply handing out landmark advancements at key breaks in the story, if that better suits the mood of the facilitator and players.
Because of the narrative pause rule, it's hypothetically possible (and especially possible for very new characters) to accumulate enough ticks to do landmark advancement more than once. When this happens, go through the full process in order each time. This is because each step ultimately impacts the step before it, which changes the way in which you qualify for particular things.
How to Do Landmark Advancement
Update Hit Points
Every time you do landmark advancement, roll 1d8 and add the result to your Hit Points as the new base/maximum Hit Points score. Restore yourself to full hit points if your current hit point total is fewer than your base Hit Points cap.
Advance Other Pools
If your setting uses other pools and you are entitled to them through your existing traits, advance those pools as per their description.
Advance Aptitude
Select an aptitude. For that aptitude, make an aptitude check. If you fail the aptitude check, grow that aptitude by 1 point. You may attempt this only once per round of landmark advancement.
Gain Trait
Review the traits available in your setting. If you qualify for any, you make take one new trait each time you do landmark advancement.