Last time we went to Theros, you wrote an internal style guide called Classical Mythology in Magic: The Gathering
For example, a deck containing Giratina V Star as the main attacker may also want to include Radiant Greninja to add that extra level of verve helping to clean up the opponent's board, or even Drapion V to hard-counter Mew V Max with its bludgeoning Dynamic Tail attack
This wasnt always the case since colored artifacts werent all that relevant up until the last few years
If your deck meets this requirement, you may put it into your hand from outside the game for three mana
The idea, I understand, is that purple Mana would help encourage a deeper feeling of alternate reality (which was supposedly the whole point of Planar Chaos )
One of the best Magic-original races is the Kor, a white-aligned creature tribe with themes around equipment