Focus Reserve
Focus Reserve adds half a Focus bar for each of its four tiers. IGN describes it as necessary for performing more complex Focus attacks and states a requirement of 250 XP. This upgrade is tied to XP rather than the score thresholds described for some other shrine options.
How it works
Choose it at a Dragon Shrine if you want more Focus capacity. The evidence specifies the amount added per tier and the XP requirement, but does not say whether the 250 XP requirement applies to every tier.
When it helps
Consider it when greater Focus capacity would enable more complex Focus attacks.
Read the supporting references
Skills and Dragon Shrine upgrades in Sifu. Covers named moves, passive upgrades, their documented effects, and supported requirements. Does not compare editions or claim current rankings. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.