You can already otk quite well as abyss shark double battle damage for the first number monster that attacks and the new shark drake card as it can also make two attacks that also do piercing mean your almost always getting game
Lowers opp atk by 500 long as on board, also negate all momster effects of opp in battle phase. Does not state for how long so like ice barrier trap, activate effect and it negates perma
I think you can do it in TCG format and unfortunately the frog is banned in OCG. To make it happen you have to bring double bahamut shark, it has a soft OPT effect so you can summon the frog.