On the topic of Sea Monsters, there are some 'sea-monster-like' cards that doesnt have the related types, and some cards with the related types, but have art that maybe doesn't fit the types. Example: Stormtide Leviathan is, as far as I can observe the art, a giant fish, but it has the name and type of Leviathan. Conversely, Fleet Swallower, is also a giant fish, big enough to rival Leviathans, but still just a Fish. Why is this the case?

Because we make a lot of cards and there are only so many constraints we can pay attention to.

So Outlaw is a grouping (Warlocks, Pirates, Rogues, Merceneries, Assassins), along with Party (Wizard, Rogue, Cleric, Warrior)If/When do we get Sea Monsters for Kraken, Leviathan, Octopus, Serpents as a grouping?

If, but small if.

I love batching! The recent Outlaw batch was fantastic flavor, and it got me thinking about something I’ve wondered for a while. Would it be possible to have a “sea creatures” or “sea monsters” batch? We see cards on occasion that care about various sea-related types, like Leviathans, Krakens, and Octopi, but there’s never been exactly a fixed or comprehensive list due to space. Would creating a batch for those types that could include a wider range of types such as crabs, fish, merfolk, homarids, (clamfolk?), and more be possible?

Our internal rule is to limit batches to five, and the sweet spot is three.

The "parties" that have appeared in the past and now the "outlaws" are an interesting experiment!
Kiora asked when Kraken, Leviathan, Octopus, and Serpent would become "sea monsters."

Tell her it’s possible in the right set.

Hi Maro :) I'd like to trade in my survived-another-trip-round-the-sun token for some trivia about Xerex or Segovia pls

I love the planes that have some oddness to them like that, and I know that oddness is exactly why we'll probably never get to see them star in their own sets, so they definitely need more blogatog info to compensate

Segovia came about as basically a joke. This card got printed in Legends:

The Leviathan was obviously huge as evidenced by the whales in the art. But the card was a 3/3. How could that be? This prompted someone, on what was then called the continuity team, to invent a special world where everything is tiny. And as Magic works, once you invent something, it finds ways to get used.Happy Birthday!

Can I please request that Shark be added to the sea creature batch? (Kraken, Leviathan, Octopus, Serpent, or Shark) I eventually want to build a shark deck for my boss - she loves sharks - but there is not a lot of intrinsic support for the tribe. I’m hoping there might be some in Bloomburrow.

The problem with “underwater” batching is there are a lot of things that could be on the list.

Hello Mark, It is my birthday and I wanted to thank you for a) the typal coupling of serpents, octopuses, leviathans and krakens becoming a recurring theme. It’s led to one of my favorite, most effective decks (and an EDH deck that’s, well, getting there). And b) switching from tribal to typal, even if primarily internally. It’s very cool of you all to take that into consideration. I hope you have a good day. ^_^

I will. Happy Birthday!

is there a reason why Nezehal, Primal Tide isn't a leviathan? I mean, it's a giant sea monster. which makes me curious,how do you go about defining Leviathan from Kraken and Kraken from octopus?

It’s a feel thing. There’s definitely some subjectivity.

Would you ever consider a combined creature type? For example using the creature type "Sea-Monster", and having rules text that states Sea-Monster is all of the following: Kraken, Leviathan, Octopus, and Serpent. This would make cards like Runo easier to read, and if a new creature type comes out, it would be easy to add it to the list.

When we use batching the card still has to state what the batch covers in reminder text. I’m skeptical we’d use a batch on the card type line.

With y'all working on sets 2 years before release does it ever get eerie when you start getting request for things that re literally about to release? (ex. "Eye horror" , I feel like a lot of ask for this came up with the beholders and the "kraken, leviathan, octopus,..." Has come up alot recently too)

It happens so often, I’m pretty used to it.