One word.

Tentacles.

More then one word.

Sorta like in Gin'iro no Kami no Agito, with the whole living forest and stuff. Alien plants and lots of tentacles. See, all these living and bleeding things are really gross, so they want to kill them all and turn the whole universe into one huge "forest".

Vines extremly thick, reaching from infected planet to infected planet. In a huge spider web of warp hungry vines.

There roots reach deep inside a the planets core, and somehow they leach dirrectly off the warp itself, making warp powers or whatever extremly hard to use because of them draining so much from the area. Or something.

I dunno, it just needs tentacles. That is all.