When it dies, it splits into two smaller Wurms, one 3/3 with Deathtouch and one 3/3 with Lifelink
By the second turn, we had one creature on the battlefield, but even then, we were facing down an already-expanding army, buoyed by lucky scheme card draws and clever plays from our Archenemy
Emet-Selch, Unsundered does make for a good Commander, its true, but it also slots really nicely into Dimir and Sultai graveyard focused builds
Then we have a load of Auras that can turn lands into Swamps, including this one drop Presence that turns the enchanted land into a Swamp and was in the first set
Arixmethes's effect causing it to be a land overwrites any earlier effects that gave it additional types