Muraganda: Mechanics

Prowl: You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Lizard. Used on 1 cards: Pouncing Fangmaw

RWB mechanic?

All colours?

*Primal* -: Used on 2 cards: Young Imperiosaur, Spell Shred

GUR mechanic - If only mana produced by basic lands was spent to cast CARDNAME...

Rebirth: You may cast this from your graveyard by sacrificing a creature in addition to paying its other costs. Used on 0 cards:

BGU mechanic

(A creature is weakened if its power is less than its base power or its toughness is less than its base toughness.): Used on 0 cards:

UBR mechanic

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}()]".