Mounted and area

[Merm7th]

When mounted, you are considered to be occupying all the squares of the mount. How does that interact with attacking adjacent and area spells centered on me.

If I'm on a colossal dragon and whirlwind attack, I potentially hit everyone adjacent to the dragon?

If I'm on that same colossal dragon and cast antimagic field which is a 10 foot radius emenation, centered on me, would it affect the entire dragon plus 10 feet out?

[Nefreet]

I suppose so, since you aren't in any single determinate square.

[Chess Pwn]

yes, you are the size of your mount when you're on a mount.

[James Risner]

Merm7th wrote:

would it affect the entire dragon plus 10 feet out?

yes