I really like that idea, as cascading into a dismember feels really bad. Cascading into a Domri would be awesome. Also thinking of replacing a cavern of souls with a Blast Zone. This is my list after adding the three cards: https://tappedout.net/mtg-decks/12-04-19-gruul-eldrazi/?cb=1558639272
My list is very similar to yours, I decided to cut Kessig Wolf Run for Blast Zone instead of the Cavern of Souls, as I rarely used the pump. I also opted to play 2 Birds of Paradise over Mind Stones now that Domri can buff them to 1/1 flyers (which has come in handy a few times already).
As for my testing with Domri, Anarch of Bolas; I love him a lot in this shell. He always feels really strong and cascading into him or hitting him with matter reshaper is usually a huge swing (fixing mana, fighting their creature or just adding that extra bit of punch to swing for the win).
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My list is very similar to yours, I decided to cut Kessig Wolf Run for Blast Zone instead of the Cavern of Souls, as I rarely used the pump. I also opted to play 2 Birds of Paradise over Mind Stones now that Domri can buff them to 1/1 flyers (which has come in handy a few times already).
As for my testing with Domri, Anarch of Bolas; I love him a lot in this shell. He always feels really strong and cascading into him or hitting him with matter reshaper is usually a huge swing (fixing mana, fighting their creature or just adding that extra bit of punch to swing for the win).