If a model casts Spirit Door while within 3" of a model with Arcane Negation, choosing itself as the model to be placed in 2" of a battlegroup model, and the other model is outside of the range of Arcane Negation, is the caster considered to be the "target" of the spell?
If so, can the spell be cancelled using Arcane Negation, or does the spell not target a model, so therefore cannot be negated with Arcane Negation?