Some Questions re: Animate Dead

[Chester]

Hello! These questions concern my level 9 Dread Necromancer. 3.5 rules, Cha. 22.

1. When I use Desecrate with Animate Dead, the undead gets extra HD. Does this count towards number of HD I can control?

2. Do the extra HD afforded by Desecrate factor into the spell component expense (i.e. Onyx gem size)?

3. Base racial HD for a zombie can't exceed 10; it's 20 for a skeleton. Again, when using Desecrate, does this impact max HD of the created undead?

I appreciate any clarification you can offer.

[sleepyphoenixx]

Desecrate doesn't grant additional HD. It adds +1 hitpoint for every HD the undead has.
It also lets you create double the HD in undead that you normally could with a single casting.

[jedipotter]

I appreciate any clarification you can offer.

1. Deseccate does not give undead more HD, just more HP: An undead creature created within or summoned into such an area gains +1 hit points per HD. So a 1hd skeleton will get +1 hit point.

2.No bonus HD, so no.

3.Again, no bonus HD when you create undead in a desecrated area.