VIDEOS:
Morgana le Fay
In the series finale of Trollhunters, the heroes manage to stop the Nigh-Invulnerable Morgana Le Fay by shoving her through a portal into the Shadow Dimension and destroying the Skath-Hrun, the one thing that could open portals too and from there, at the same time.
Example of:
Sealed Evil in Another World
Example of:
Invincible Villain