Q 137: Interesting question came up tonight regarding an incorporeal shadow, and movement into and out of the ground.
The shadow will provoke an AoO for dropping down into the ground while standing next to someone. The question was if it would provoke when it moved up out of the ground next to someone.
I say no it does not, because the square he is leaving provides the shadow with cover vs the PC.
Another player said yes it will, because a shadow is only good maneuverability, and so it costs double movement for it to go up.
I think this is wrong, because looking at the 3D movement table (DMG p.20), it doesn't say that it costs the good maneuverability creature double movement to go up, rather, it only moves up at half speed.
Q 138: Tangential question. Suppose the PC's are fighting amongst ruins in an ancient forest. All squares have undergrowth and cost two squares of movement.
A: Approaching a foe provokes an AoO because of the double movement? ie- There is one square between you and the foe, and you approach; you can't 5-ft step because of the terrain.
B: Same situation (ruins in undergrowth terrain), but the two individuals are in diagonal squares around a hard corner. The hard corner gives cover to both individuals. One of them steps five feet (costing 10 ft of movement) to stand right next to the other, removing the cover. Is an AoO provoked?