Darting Viper
Druid Utility 16
You transform into a viper and slip away from your foes. You then return to your normal form but retain some aspects of the viper for a moment.
Personal
Prerequisite: You must have the wild shape power.
Effect: You shift your speed. During this movement, you ignore difficult terrain and can shift through enemies' spaces. You then gain a +4 power bonus to speed and can move through enemies' spaces until the end of your next turn.
Darting Viper is a 16th level Druid utility power. You shift your speed and ignore difficult terrain and can shift through enemies' squares. [PrP:47]