Discworld: Mechanics

Belief: Each other creature you control that shares a color with this card counts toward this card's belief count. Used on 0 cards:

is similar to devotion, except that it only counts creatures, and their colors, not the mana symbols in their casting cost.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".