Morph, Space Goo Emerald is already considered one of the best colours to play if you like using Lorcanas Floodborn Shift mechanic, which is the ability to play character cards for cheaper by putting them on top of a character with the same name that you already have in play
Disney Lorcanas third TCG set travels Into the Inklands with dogs, DuckTales and a brand new card type Piglet's a pirate captain, now
The most important part of The Destined Warrior, however, is actually its color identity
Each of those, like the Darkness Crystal, will reduce the mana required to cast a spell in its appropriate color by 1, and will cost four mana two of the color of choice, but the rest is unique to each Crystal
This is a meta valve that slows hyper-aggro and races control by swinging the lore track
Getting to use those cards as removal and then cycle them for draw is pretty powerful