How to use the Burrow movement?

[Patryn of Elvenshae]

I would echo the Crowking's line, burrowing that takes digging would draw AoO, Earth Glide ability burrowing would not.

To bad the RAW didn't clarify this. Seems to be a lot of that going on recently (whip, entangle, etc.. )

The reason it didn't clarify this is because it does not need clarification.

Movement provokes AoOs. Not "normal movement" or "walking / jogging / running."

The only place that might need a clarification is in the case of Earth Glide, the creature may have cover from the ground during parts of their movement, and a creature with cover doesn't provoke AoOs. Even then, this isn't so much a clarification so much as a reminder.

 

[Infiniti2000]

No, that's not correct. If you do nothing but move, the square you started in doesn't count as threatened. That's it. If you move out of another threatened square, you provoke an attack, as normal. This means that if you are adjacent to a creature with reach, you can't get away using normal movement without provoking an attack.

You specifically need to use the Withdraw action. For example, using two movement actions (just movement) is not sufficient. Using the Run action (just movement) is not sufficient. Withdraw has other special considerations than just movement (i.e. not usable against invisible opponents, cannot use it while blind, need to have the listed speed).