+1 for Refused.

This isn't truly junk if you are splashing in colours.

Beg to differ when the land base is all junk, the deck is a junk deck.

I've made a similar deck except I'm using Deadbridge Chant. I never even thought of Lotleth Troll or Mulch. What would you replace Mulch with after rotation?

I used to run 2x Deadbridge Chant s, but the 6CMC cost and slow activation (besides the 10 cards, doesn't do anything until turn 7), it was running a bit too slowly.

Honestly, Drown in Filth doesn't seem like such a bad card, especially since I never read it as "all land cards" in your graveyard, not just whatever got thrown out by the spell. And working with -1/-1 counters is always nice. It has potential, but I'll see what Theros brings as well.

Deadbridge chant is rather slow. I completely forgot about Drown in Filth, are you sure its -1/-1 counters? Or is it just -1/-1 until end of turn? If its counters, thats bonkers. Do you think Glimpse the Future from M14 digs deep enough for it to take over for Mulch if Drown in Filth doesn't work out? Would splitting color pie be too drastic for that? Do you think a 5 color version of this deck would be viable?

Yeah sorry I meant just pure -1/-1, counters would be silly indeed. Definitely will be staying only 3 colours post rotation, if not just going green/black and losing white. I don't think there's enough room to utilize what blue has to offer, let alone all five colours.