2 Jorn, God Of Winter // Kaldring, The Rimestaff Jorn is a modal double-faced card, with a green creature on one side and a blue-black artifact on the back meaning it has all three colors in its identity
Itd be a funny card to play, but is it a great card
However, if by some terrible luck you do struggle to flip your manifested creatures, you can rely on a backup plan of Experimental Lab / Staff Room or simply pay the card's mana cost at any time
Holy Mantle makes a creature unblockable and gives it a significant buff
Since they go from the battlefield to the graveyard, they trigger abilities that care about creatures dying like Blood Artist
The other direction that Im wondering about is whether G/B Ramp can be adjusted to better target the metagame as it exists today