Spell Damage + Spell Drain + Movement Speed = Chafed Feet
After casting a spell you create a path for 5 seconds beneath you damaging enemies who pass through it for 10 * (1 + Spell Damage Value) damage per second. As long as you create the path you have no unit collision and your Movement Speed Value is doubled. Damage dealt through this feat will be drained with twice your Spell Drain Value.
Spell Damage improves the damage.