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Suppose I'm playing a ranged character. I am standing with an ally between me and my enemies, which grants "+2 defenses" for cover. I decide to further go prone. Do I now have a "+4 defenses", 2 from cover and 2 from prone? Or is "going prone" a 'cover bonus' and therefore nonstacking with the cover bonus from my ally?

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Don't forget that prone also gives you a -2 to Attack, and significantly limits your mobility. So, the question becomes whether the +2 to ranged defense worth it? – Iszi Jan 19 '11 at 15:22
Magic Missile Never Misses :) – GWLlosa Jan 19 '11 at 15:23
up vote 12 down vote accepted

Prone gives you:

You get a +2 bonus to all defenses against ranged attacks from nonadjacent enemies.

Cover gives the attacker

-2 Penalty to Attack Rolls (for ranged attacks)

So against non-adjacent ranged attacks you have a +2 bonus to all defenses and the attacker takes -2 to his Attack.

Effectively your defenses are 4 higher.

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Ha! +1: Quicker than me and with a more readable anwer :D – Erik Burigo Jan 19 '11 at 15:15

Cover does not grant you a +2 bonus to defenses: it imposes a -2 (unnamed) penalty to attacker's attack rolls.

Being prone grants you a +2 (unnamed) bonus to defenses against ranged attacks from non-adjacent enemies.

So, against a ranged attack from a non-adjacent enemy you got a +2 to all defenses for taking cover behind your ally and the attacker gets a -2 to hit you because you are prone.

As a reminder, however, unnamed bonuses stack unless they're from the same named game element.

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"Unless they're from the same named game element". – Adriano Varoli Piazza Jan 19 '11 at 15:16
Correct. A condition that I remember only when on topic but that is always true. Going to edit. Thanks. – Erik Burigo Jan 19 '11 at 15:17
Minor correction - all penalties are untyped, and therefore stack (unless they are from the same named game element) – Pat Ludwig Jan 19 '11 at 15:21
I remember so too. I wrote about bonuses (not penalties) because of I was unsure. – Erik Burigo Jan 19 '11 at 15:22

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