Human eating plant monster spawns!

Last summer I planted some basil in this pot and put it in the back yard. As with anything I plant it died soon after. The pot then sat outside untouched until two months ago during our move when I grabbed it and stuffed it into a plastic Wegmans bag, and then I forgot it existed. Today I pulled some stuff out of my bike closet to make a run to the storage space and swap out some winter gear for summer gear and to my surprise I found this:

What is it? No clue...looks like it's gonna be big though. Kind of scares me. Maybe I should put it back in the bag and stuff it back into the closet.