Giving all your dragons indestructible means you can swing and block without fear, and the bonus of stacking +1/+1 counters every upkeep quickly snowballs, all on top of a potential alternate win condition
We find Meteor to be a much more exciting card when it appears in the midgame as a way to come back from disadvantageous board states, rather than as a key part in defining the early game
As a player who cares primarily about Underground Sea as a game piece rather than as an investment, a few dings, scratches, or an artist's signature probably aren't a big concern
You can also flicker or reanimate it if youre looking to get extra value
Just like how Niv-Mizzet counts two colors, use multi-colored lands to smooth out our mana base
The key thing here is that Insolent Neonate allows a player to discard before drawing, which means that you can discard a card with dredge and then, instead of drawing the card, immediately start dredging