Abyss Rising Fish?

That ugly guy is still the boss.

Basically , the combo I'm thinking of:

Activate Superancient Deepsea King Coelacanth (SDKC), discarding Atlantean Dragoons to special summon 3 Mermail Abyssmanders and a Royal Swamp Eel, then using the Dragoons' effect to add Moulinglacia the Elemental Lord to your hand.

Do whatever synchro or xyz plays that you can do to get exactly 5 WATER in your graveyard. It depends on the number of Treeborn Frogs, Ronintoadins and friends that you loaded your graveyard with. Remember to pick xyz that can detach from itself without rough conditions (I'm talking of Maestroke, Photon Papilloperative, Abyss Dweller or something like that). If your opponent is running low on Life Point (rarely happens since you can only push once per duel), you can just go for the mighty Shock Master and call trap. I know you want to prevent Gorz/Tragoedia but Shock Master stops yourself too.

Back to the combo, after load your graveyard with WATERs, drop Moulinglacia to pick 2 cards from your opponent's hand. From this point you have SDKC, Moulinglacia and usually 2 synchro/xyz monsters on the field, enough for an OTK in most cases.

Sometimes after getting 1 Abyssmander into the grave you can use its effect to pump the 2 other Abyssmander to level 6 and go for Strike Bounzer/Force Focus/Exa-Beetle, or level 5 for Adreus/Volcasaurus (most of the time, to deal some damage then upgrade it to Gaia Thunder Charger, OCG use only, but it conflicts with Abyssmander which is a TCG Exclusive LOL).

Or when you don't have access to Moulinglacia just make Scrap Dragon + Stardust Dragon/Thought Ruler Archfiend with Ronintoadin as your free Scrap Dragon's bullet. 2800 + 2800 + 2500/2700 is still an OTK anyway.

The damn weaknesses is Moulinglacia itself. If you fail to OTK and your opponent clear your Moulinglacia next turn you'll be stopped for a turn, and then realize you have nothing left in your deck for combos. Metabo Shark or Pot of Avarice? They're dead in your hand most of the times IMO

Still I'm thinking because the additional OTK conditions (Atlantean Dragoons and Moulinglacia) take 5-6 slots in main deck, which used to belong to Light and Darkness Dragon and some extra defense (Tragoedia, Maxx C, Veiler...). It helps OTK, but it also make you feel dead when that OTK fails.

What do you think?

If you have time, feel free to make a deck based on the combo and test it for me, I'll be highly thankful for that :D