Demiplane spear

You create a Blood red spear.  When activated, the spear launches itself at a target

The target must succeed on a DC 18 saving throw of their lowest Ability or be launched to a demiplane you created.

Each time you cast this spell, you can create a new demiplane, or have the spear connect to a demiplane you created with a casting of the demiplane spell. Additionally, if you know the nature and contents of a demiplane created by a casting of the demiplane spell by another creature, you can have the spear connect to its demiplane instead.