In addition, it is critical in the grind game, since it can summon other "Nimble" from the graveyard
Some of the creatures have the new squad keyword, which basically works the same as replicate (see Train of Thought) only for creatures, giving you tons of built-in ways to multiply your creatures with ease
With it, its just the Wild West
You need multiple players at once
Learn more about Golgari Yawgmoth in Zen Takahashis recent article But I strongly feel, that most green decks might play it in a Sideboard slot, trying to deal with the likes of Blood Moon, Damping Sphere (if youre thinking about Amulet Titan), Torpor Orb, or Rest in Peace
Technically I love both Koma's, which includes the newer Koma, World-Eater, but I think it's widely accepted that the Cosmos Serpent is the better of the two legendary serpents