What is it?
Not a new, but still decent idea to create map like old Shadowraze Wars, but using another hardest hero from dota - Invoker, with his elemental powers and different combos.
What about gameplay?
You get Grand Mage Invoker under your control, and play for best user of his power against other players, or in teams. 3 elements for combos, 9 resulting spells, more than 20 artifacts, ported from dota, and cup of fun.. But that depend on your decision.