These set-specific treatments are a major draw for collectors who want cards that cannot be pulled from play boosters
While it doesn't struggle to generate a battlefield presence, without counters to back it up, you'll only have an army of 1/1 tokens, which aren't going to be very damaging
Now that includes inking a card like you normally would each turn but that also includes all the ways in which Sapphire can get extra ink on their turns including songs like One Jump Ahead and the new Friend Like Me, items like the Fishbone Quill, and the multitude of characters that mess with your inkwell like Belle, Strange But Special or even an opponent using a Hades, Infernal Schemer against you
Hallowed Fountain Land - Plains Island As this hand enters, you may pay 2 life
Eldrazi already tend to reward you quite well for the large amounts of mana you put into them, why not make that reward even more absurd
Moving towards slower, more value, or more budget cubes this seems to get significantly better but perhaps still not good enough