I thought it was pretty freaking obvious from the novel updates image. http://www.novelupdates.com/series/douluo-dalu-2-the-unrivaled-tang-clan/
Yes. Also, a little spoiler : Spoiler Wang Dong's real name is Tang Wu Dong, daughter of Tang San and Xiao Wu. So, when Huo Yuhao became a god, he had a face to face with his father-in-law
Time flows differently in the god realm.10,000 years past in the mortal realm and technology advanced beyond hidden weapons.
They tried to follow Tang San by making their clan leader a Blue Silver Grass User. Unfortunately, Tang San is a Blue Silver Emperor and although they know this I really have to wonder if they are just plain stupid.
He met him before that on very messed up scene. Spoiler Tang San angry and comes because Ju Zi (Sun-Moon Queen) reveal that she have Yu Hao son. Their weapon technology got behind compared to Sun-Moon Empire. That makes them declining since that is their main income to fund and nurture their sect. If we make comparison : Before Tang sect hidden weapon appears people using normal bow and arrow Tang sect hidden weapon in DD1 is automatic mechanical crossbow Spirit Guide Tool in DD2 is old school gun Tang sect version of SGT is advanced gun DD3 power armor is Iron Man suit
For his Spirit Eyes Battle Spirit? I may be wrong, but I think it was a ring with a group weakness skill. If that's not 3rd, it's the 4th. Most of the MCs rings for his Spirit Eyes are more of support techniques, but they play a big role in battles, especially in group fights. It's his other battle spirit that has the firepower
Oh, you mean the one he encountered around the same time he first met the silkworm? He's not going to be a spirit ring, but someone who'll give the MC another ability. Actually, that person is a tie in from another TJSS novel (Shen Yin Wang Zuo). Spoiler In Shen Yin Wang Zuo, Long Haochen (the MC) encounters a previous Scion of Light (Holy Necromancer Elux) that became corrupted because of treachery, etc. That person managed to tie in together the art of necromancy with his holy light attribute, resulting in a unique combination of death and light magic. Later on, MC manages to somewhat purify his soul, however for some reason or another (I forgot exactly) his soul had to dissipate (maybe as repentance?). Anyway, the other entity inside of Huo Yuhao is a portion of Elux's soul. Huo Yuhao learns necromancy from him, which he uses to occasionally disguise himself as an evil soul teacher as well as other nifty stuff.