I'm making a Fighter/Ranger who wields a glaive and who will have Guardian Soul, a 3rd-level feature of the Primeval Guardian ranger subclass (from Unearthed Arcana: Ranger & Rogue), part of which says:
Starting at 3rd level, you gain the ability to temporarily grow and take on the appearance of a treelike person, covered with leaves and bark. As a bonus action, you assume this guardian form, which lasts until you end it as a bonus action or until you are incapacitated.
You undergo the following changes while in your guardian form:
- Your size becomes Large, unless you were larger.
- Any speed you have becomes 5 feet, unless the speed was lower.
- Your reach increases by 5 feet.
While wielding a glaive, which has the Reach property, I have a reach of 10 feet. With Guardian Soul, that reach increases by 5 (to 15).
Does the Large size I get from the transformation of Guardian Soul inherently add more reach? When I read about reach, it seemed to say that Large creatures have a base reach of 10 feet. So would that be +5 reach from Large, +5 for Glaive, and +5 for Guardian soul?
If I'm already Large and have a reach of 10 feet, and the Guardian Soul transformation just adds 5 feet to my reach, does it stack?