Help with a spell, make Sheet / Wall of Ice

[zipht]

so I am working on another spell. :) but a have a question about creating substances. What should the stat's for my wall be? should I make up stat's for walls of Ice? or should they somehow be based on the casters Will?

basicly the spell works like this.. the caster touchs the ground and a trail of ice forms to where he wills it. This ice trail can be ether thicken to form sheet of ice or stand up and be a wall of ice. Successes can be spent to make it slipperyer, or strengthen wall.

Another question I had was should I add a Majoris Sigil as to force a Agility check? For the ice being slippery, or is that just the nature of ice.

Element: water
Impetus: Create
Origin: Personal
Duration: Sustained
Area of Effect: Measured Area, 10s of Paces

so far that comes to Ob 4 Action 10

[Kublai]

The stats for the wall is easy.

Integrity = Will
Surface = 1/2 Will
Breach = Will
Destroyed = 2xWill

Integrity can be increased at a cost of 2 successes per.

As for increasing slipperiness, start with making it that you need to pass a Speed test = 1/2 Caster's Will to cross the ice without slipping. Then add +1 Ob for every 2 successes over.

[zipht]

thanks for the help Kublai, I have posted a first draft of the spell to the wiki:

Create Sheet or Wall of Ice (http://www.burningwheel.org/wiki/index.php?title=Create_Sheet_or_Wall_of_Ice)

not sure I am satisfied with it. really want to give it a Minoris Sigil or something to bring the Ob down. and I need to work on the text of the spell.