# Threatend fields for a large person with a long spear

Situation: A human character with a long spear who uses the feat "Lunge" becomes enlarged (as per spell). Question: Which fields does he threaten? Are these the squares in 15', 20' and 25' distance?

The creature can attack anything within 25' of it, but can't attack anything within 10' of it.

First, here are the pieces that are important:

A humanoid creature whose size increases to Large has a space of 10 feet and a natural reach of 10 feet. This spell does not change the target's speed.

...

All equipment worn or carried by a creature is similarly enlarged by the spell.

Reach Weapons: A reach weapon is a melee weapon that allows its wielder to strike at targets that aren't adjacent to him. Most reach weapons double the wielder's natural reach, meaning that a typical Small or Medium wielder of such a weapon can attack a creature 10 feet away, but not a creature in an adjacent square. A typical Large character wielding a reach weapon of the appropriate size can attack a creature 15 or 20 feet away, but not adjacent creatures or creatures up to 10 feet away.

You can increase the reach of your melee attacks by 5 feet until the end of your turn[.]

The layering works as follows:

Enlarge person sets you natural reach (10'). Your long spear doubles your natural reach and adds a dead spot (20', not within 10'). Lunge then adds 5 to your reach (25', not within 10').

I've not found a great citation for reach/natural reach, but it appears to be used to segment bonuses for calculations like the above.

Your reach calculation appears to be:

((natural reach * natural reach bonuses) * (reach weapon modifier)) + (reach modifiers)

• I’m not convinced by your order of effects; can you provide any citation for that? I would have assumed that lunge applies before the reach weapon, so that for that turn your reach is 15 ft. and the reach weapon modifies that (ending with a threatened area out to 30 ft. but not within 15 ft.). Commented Dec 29, 2015 at 17:07
• @KRyan Reach weapons double a creature's "Natural Reach," and Lunge increases "Reach." There are three interpreations: 1. Natural Reach and Reach are the same (but then why do they go to the trouble of specifying the phrase "Natural" in the rules?). 2. Reach is a subset of Natural Reach (this is the interpretation you appear to be using); meaning that effects that increase Reach increase Natural Reach, but not vice versa. 3. Natural Reach is a subset of Reach (my interpretation); meaning that effects that increase Natural Reach increase Reach, but not vice versa. Commented Dec 29, 2015 at 18:41
• @KRyan I saw a fair bit of forum chatter suggesting three, and it fits better with the way I'd use the terms. But of course that's all just hearsay. If you have a citation for the other way around, I'd love to hear it! Commented Dec 29, 2015 at 18:42
• Actually, Paizo does not use either term consistently, in my experience. I find it impossible to draw any conclusion based on them because Paizo isn’t consistent about it. Commented Dec 29, 2015 at 18:54
• @KRyan Could you point to an example you feel is inconsistent? Commented Dec 29, 2015 at 19:24