SpliNter

2000 dollars for casual? Not legal n any format. Do i miss something?

The answer is 42

have you playtested? any results? looks solid

Here are my suggestions:
I would not play 4 nykthos since its legendary. Therefor add pendelhaven and cavern of souls
Cut one deep shadow for one more ezuri
Cut one nettle for the 4th heritage druid, its so explosive with dwynens elite
I can also see cutting another nettle for at least one visionary, never underestimate the power of the visionary!

I guess a proper deck would look something like this:

https://www.mtgvault.com/splinter/decks/unblockable-modern-merfolk/

Sure its about 30 more than yours but it has most merfolk staples you can use later on.
Take this as a reference

Uh, what about lead the stampede for card draw? Could be neat!

Thats a pretty good explanation here! I also think you wont have any fun playing this budget version if there are zero modern merfolk staples in it. I think lord of atlantis silvergill adept and spreading seas are essential. Then you can upgrade the rest of it sooner or later.

Cards to consider:
Lyra dawnbringer, martyr of sands, scroll of avacyn

Add one or two Moorland Haunt

Come on guys, nearly 140 k views on the first day? Thats literally all cards that happen to have boobs on them. I guess thats exactly why we dont get that anymore in newest sets. Happy fappening you all.

Hey there, sweet tribal deck!
Because you run notorious throng, i would try to add some more rogues. Therefor i suggest 4x metropolis sprite and also you should run all 4 blackguards.
And you should add some removal an counterspells. I would play like 3 doomblade, 1 pepersmoke, 4 spellstutter sprite, 3 mana leak.
For that you can easily cut all of those 4 mana faeries, they are not very good. You will see 2 mana sprites with scion of oona, blackguard counters and favorable winds get big enough. Metropolis sprite can get pumped up by herself to.

I guess Grand Architect is going to be replaced with m19 Supreme Phantom. Maybe this is the card that pushes spirits ahead. I havnt had any good results with spirits so far. Have you considered playing aether vial? It helps playing creatures while holding up counterspells.

I dont like your mana base, paying life for 4 fountains is not necessary, also you can not search for basics if you get field of ruined or pathed. Besides that there are no outs to blood moon.

Keep me updated on how testing goes!

This is a joke right?

I think it's a well designed deck, I like it!
If I could change a thing, I'd cut one Familiar's Ruse for a Doom Blade effect. And probably cut one Pestermite for the fourth Scion of Oona.

Cute deck! Since you are playing that many creatures i think spellstutter is your best friend, id play all 4 of them! Also scion of oona should be 4 of - it puts a clock on your opponent very fast.
Peppersmoke is great but you dont have any other removal for bigger creatures, so make sure to add some go for the throat/doomblade.
There is also oonas prowler, a great card that would fit the rogue theme here.
Wydwen on the other hand - im not a big fan of

I dont think company into steel leaf necessarily wins the game. It is a great beater but i guess ezuri and shaman win games on their own. Elfes heavily rely on their one drops, i would not cut elvish mystic for steel leaf champion

I think i miss something here, what does prospector do for the deck? Why do you play 27 lands?

To me this looks a little antisemitic, jewish players could be triggered here. I recommend to change the name and description if you dont want to get banned. There should be no place for political or religious discrimination in magic.

Pretty neat casual deck! You lack in card filtering, top card manipulation. I would run 4 serum visions and like 2 opt for example. We dont have preordain in modern btw.

I dont think there is need for green. On the other hand there is essence warden in green. First id cut those 6+ mana spells