This should have been build topic, but...
1: Yes, it does.
2: Like any other spell. DC 10 + spell level + wisdom mod (for cleric) + any relevant modifiers such as spell focuses.
I'll lock this, the question was answered. In the future, please put mechanical questions like this in the build topic, and alos use the NWN wiki (
www.nwnwiki.com) for things.