Need some help statting a demon...

[Eternally Lost Zeppo]

I'm running a one-shot to playtest the system, using this scenario that I came up with: http://lostzeppo.wordpress.com/2010/05/08/adventure-seed-dresden-files-rpg-the-killing-ground/#more-88

I've got stats done for the ghosts, all I still have to do are the stats for the demon and the sorceror who summoned it.

I'm still not entirely familiar with the system yet (I'm terrible at reading PDFs), so I've based much of the demon's stats on the toad demon from Storm Front, but what I need some help with is coming up with its earth manipulating powers. Any thoughts?

[luminos]

perhaps channeling (earth)?

[JosephKell]

Things are very abstract in fate.

Adjusting the ground to seal a cave opening is basically a block to athletics checks to change zones over that border.  Ritual (Earth Mover) or Thaumaturgy makes the most sense for this (for persistence).  Channeling (Earth) means you have to deal with shifts of duration.