Portal Gun / Warp Staff : Item for global mobility

[alyimoff]

I think the game lacks a late-game item for mobility. What is my idea: this item allows you to place a portal/teleport to which you will be transported the next time you use the item. After moving, the portal disappears, and the ability takes a long cooldown.
This will allow you to push away the line or protect the ancient while being far from the base, or use it near the battle to save you.
It may be in spirit or vitality and give appropriate passive stats