I play tested my list with Kess yesterday vs Madru and D&T. It's really good once bolas dragon god hit the table you almost always win.
I think the deck weak againts combo deck. Have to play test vs dredge and amulet titan.
hi I just make a grixis deck, usually I play with UW control
this is my deck list
considering replacing card after modern horizons
1 cryptic command and 1 countersquall to 2 archmage charm
1 tasigur to 1 kess