CEDH decks exploit this by dropping stax pieces, like Magus of the Moon and Thalia, Guardian of Thraben, but you could also cheat in big bruisers like Captain of the Watch
Ability costs can include ink (paid by exerting cards in your inkwell), exerted cards (paid by, well, exerting cards) or something else explained on the card itself
This could just be a cameo mechanic, but its great to see this beloved Eldraine tradition return at all
I dont trust this breakdown very much for several reasons, but Im still going to use it, and Ill talk about why in a bit
If the cards can be used for decks that include either ink color, it would allow for more deck builds
Always pack enough cards to fill your inkwell : If you dont have enough characters, or abilities, to create a strong ink-well pile then youll eventually be outpaced by your rival