Especially given the contentious nature of the guilds, theres a good chance that while together they would be able to put up a real fight against the Phyrexians, they will fracture, split apart, and fall to infighting
Changeling Outcast and Mothdust Changeling are primarily freerunning enablers, but a handful of your other cards benefit from assassins dealing combat damage
If Comeuppance has zero fans, I am dead
MTGs Street Fighter Secret Lair is an important building block towards MTGs current success
And while the other artifact hate cards are good in specific situations, nothing matches Stony Silence in terms of its power to simply beat a certain percentage of decks all by itself, which is why it is so good and heavily played in Modern
It gives all creatures hexproof and indestructible for a turn, gives all players hexproof, and makes it so that no one can lose life, win, or lose the game that turn