As far as I know the real source is known to WOTC and was shut down once before, reopening their business shortly after that under a new name
Now that March of the Machine has been released, unsurprisingly, we can confirm this prediction was accurate
Confusing Card Advantage Unlike many counterspells, Arcane Denial actually increases the number of cards in hand for all players
Turning creatures into vehicles also removes summoning sickness and the risk of dying from damage or low toughness, while retaining all other rules text
If we chose not to use Rule 7s replacement effect, our Commander stays in the exile zone
Itll be very unlikely that anything they play with morph so unless they have some way to flicker or bounce it, it's stuck face-down while in play