There is no way to save it automatically saves for you every month or two
Chat with our AI personalities
Chill out n speak to it n dat
donate or go on the crater once a day and save each credit you get once a day.
delete your save file and start a new game
Lightning Vortex is non-targetting so it never really activated 'on' a specific monster, even if it's alone. If your opponent uses Lightning Vortex and you have an XYZ monster, that monster will be destroyed, as per usual, unless that particular XYZ can save itself from destruction with an effect.
Yes. The chain will finish resolving first of all, summoning your Fusion Monster. Elemental Hero Absolute Zero's effect will then activate, destroying your Fusion Monster unless you have a way to save it.