1) Make a dummy auto-cast spell. 2) Events Unit - A unit Begins casting an ability Conditions (Ability being cast) Equal to (Dummy Spell) Actions Unit - Create 1 Dummy Caster for (Owner of (Casting unit)) at (Position of (Target unit of ability being cast)) facing Default building facing degrees Unit - Order (Last created unit) to Night Elf Keeper Of The Grove - Entangling Roots (Target unit of ability being cast) Unit - Remove (Last replaced unit) from the game