bliviongate: Holding spells as in using a shock spell and keeping it held on the person until they die. Not actually grabbing spells people cast at you.... Although that would be pretty cool.... :

most of the things you mention is something that belong to Oblivion not Skyrim :shocking:

Mythic dawn worships dagon and dagon was kicked to oblivion for good at the end of the main questline in Oblivion
Oblivion gates were also closed for good at ^