Hi!

I think 3 null rods are enough. You don't need it turn 1, as you can cut combo on the 2-3 first turns, and dig for it. It is not blue, so you may eat it with fow or missdi. I tryed 4 and 3, and i prefer having 3

Lord of atlantis is good VS blue (80% of the meta), thank's to the islandwalk, but most of thoose decks don't have many creatures, so it will just break the game on your site sometimes.

I really think cursecatcher is the best creature of the deck. It's an amazing backup at turn 1, and helps after that. And it's the only thing to save you from ichorid :S

Do you play Lotus? Try muta + lotus + tuna + standstill on turn 1.. 

17% + 12,5% + 45% + 34% that's the chances, not including mooligans, or the opponent starting, and you drawing an 8th card.

I wouldn't play umezawa. Maybe one or two sword of fire and ice sideboards right.

Another point, i would not use selkie, even if it is the second best merfolk ever (After cursecatcher). I'ts too slow for this deck

Hi all

Merfolks decks depend a lot on the meta. Actually in Spain the meta involves lots of tezz vault, control, stax and so on. Null rods are a must. Maybe 4 is too much, 3 are ok. Standstill are another must, the time you have lots of tuna to play on earlier turns, and mutas to rape your rival. Remember to play muta AFTER standstill, just watch your opponents face lol.

The priority of this deck is to summon. Just summon as much as you can, breake the opponents mana curve, and stop with null rod and standstill. Play play and play. That's why the deck should include counterspells like fow, daze, cursecatcher and misdi backup. No need to stay untapped, unless you want to bluff. 

It's amazing how this deck works, you will grow your fishes with merrow and lords, the time your opponent realizes the small fish you summoned on the first turn has became a 4/4, it will be too late.

Pros: Fast, breaker, mono blue.

Contras: if there is no counter back up, you will be robbed. INKWELL... hate. And troubles to win goyfies...