Don't disregard your initial estimates early
This becomes a lot easier to build if money is no object, but thats unfortunately not a reality for most of us, so I tried to keep it as limited as possible
The Enchanted version of the card shows her holding a trident and golden crown, both items that definitely shouldn't be in the sea witch's possession
Thanks to the always useful work of Frank Karsten, I have a handy chart showing the differences between the number of lands and the odds of hitting each early land drop, plus the odds of mana flood: The numbers for 17 lands in Limited are similar to the ones for 25 lands in Standard
For example, Hero of Precinct One makes a token whenever you cast a multicolored spell, and General Ferrous Rokiric creates 4/4 Golems the same way
You get a 5/5 flash threat that is a way to interact with the opposing board