Drizzt is already well-statted, but when your other creatures start to die, youll get a huge creature as a benefit sort of an inverse evolve
Red Elemental Blast The main reason why Red Elemental Blast exists is to fight blue decks
Below youll find a gallery containing each card, including enchanted rares, from Azurite Sea
I dont know if those two uses make them worth an include anywhere, but I played Apex Altisaur in Legacy recently, so its entirely possible
Bear Umbra also serves as a good way to trigger Gargos too
If you look at the price of cards like Darksteel Forge and Avacyn, Angel of Hope, you can see how making your board unable to be killed is something that a lot of players love