Umi Lock : Kairyu's Revenge

Here's a quick summary of the deck for those who wanna try something fun.

Kairyu Shin under Umi is a little cheeky ******* who locks your opponent from playing the game. It's a mandatory effect so it cannot be negated.

You can abuse this by using Sea Stealth II effect during the battle phase to nuke your opponent's board by surprise.

Sea Stealth Attack will help you protect your board and destroy your opponent's monsters during the Battle Phases.

Ice Barrier is a monster shutdown and a really good searcher as well. (you will mostly use its second effect)

Use Electric Jellyfish to negate your opponent's effects, if it's in danger you can use Doom Kraken from your hand to surprise your opponent.

Extra Deck is not really important.

Side Deck for the next ban list. I will probably try using Waking the Dragon or Floodgates since they are protected by Sea Stealth Attack as well.

The rest of the deck is made for playing second.