No-Movement Unit??

Question
I saw Key of Sealings made a player unmoveable or attackable when entered the portal that teloports the player who enters back to base.

I wonder how to do that Trigger. If anyone know, plz let me know. Thx in Advance.

well... u could make the unit invulnerable and pause it, then unpause and make uninvulnerable when it gets to other location, or u could make a hidden town portal ability and make the unit use it with triggers


(i dont think that portal made them invulnerable though... u could also always just apply a buff to them that negates movement and attack speed, but i would say just use town portal if u want invulnerable, or something else i said if not)