Predefined Amount of Damage?

[Patrick Higgins]

I recently thought of an idea for a Healing power that causes a small amount of Damage to the healer instead of costing END. Pretty simple idea, Healing with no END Cost and Side Effect limitation. I had never used the Side Effect limitation, so I went to go read it. And it has a listed modifier, Predefined Amount of Damage [-¼ less]. 

 

How do you do that mechanically? I can't find the rules for that anywhere and can't seem to find it online.

[Simon]

That is largely up to the GM to determine, based on the level of the Side Effect selected.  Typically, the Standard Effect Rule is applied, though this is not a requirement.