Dorset's Fractal Form

Eight illusory duplicates of yourself split from you and move about in and around your space. They will move to prevent foes from outmaneuvering you, and will harry them in order to provide openings for you.

The duplicates are not insubstantial, as you have in fact been split into parts. The duplicates cannot attack independently, and damage is shared between all duplicates (including yourself) equally. This does not mean you will be effected multiple times by AoE spells.

The duplicates do not occupy spaces on the map, only standing within your own space, and the spaces of those you are engaged in melee combat with.

Until the spell ends, you are immune to flanking, cannot take the hide action, and all foes adjacent to you are flanked. You can use your action to dismiss the illusory duplicates.