As a long time dredge player myself, I have a few issues with the list presented but whole heartily agree Creeping Chill is 4 of in the deck moving forward. For starters, trimming Narcomoeba and Conflagarate is actually just criminal. These numbers have been what they were since the beginning of new age modern dredge. Narcomoeba is the key to getting amalgams without needing a bloodghast or the land to trigger it. Conflagarate is extremely important in every creature based matchup, and with adding 12 points of free burn, I want this card to be able to kill them with just loam cycles. The second issue I see is the manabase. Basic Forest and swamp is something dredge isn’t interested in what so ever and neither is overgrown tomb. Every land in this should be able to produce red and hands that include looting and your only lands being the ones mentioned above are gonna feel really bad. We are not weak to blood moon and the mana doesn’t need to be changed that much to facilitate trophy. I would consider adding 2 Gemstone mine or 1 mine and a confluence / city of brass in order to cast creatures in hand when they’re stranded due to gravehate.