I assume Link was saying "This should have reminder text so that people seeing the card can tell what the mechanic is."
You can use Multiverse's mechanics support to add reminder text sentences at the end of arbitrary abilities, though it's a bit fiddly. You can create a mechanic with "playtest name" BeliefReminder and "name" "(Each other creature you control that shares a color with this card counts toward this card's belief count.)". Then you'd write this card as:
> ~ isn't a creature unless its belief count is at least three. [BeliefReminder]
Kind of going for a usable, but not broken Ugin's Nexus
See Natural Fascination.
I assume Link was saying "This should have reminder text so that people seeing the card can tell what the mechanic is."
You can use Multiverse's mechanics support to add reminder text sentences at the end of arbitrary abilities, though it's a bit fiddly. You can create a mechanic with "playtest name"
BeliefReminderand "name" "(Each other creature you control that shares a color with this card counts toward this card's belief count.)". Then you'd write this card as:> ~ isn't a creature unless its belief count is at least three. [BeliefReminder]