mtg cards like omniscience border extension with Atraxa being summoned. . . . #gkalters # #mtgcommander #mtgalters #mtgcommunity #mtgalter #mtgaddicts #mtgelite #mtglife #mtglegacy #mtgmodern #cardcrack #magicthegathering #mtgpimp #magicthegatheringalter #magic From the Magic 2013 (M13) set. Magic the Gathering - Omniscience

The way challenging works is a ready (untapped) character exerts and chooses an opposing exerted character to challenge, and then both cards compare their strength (attack) and willpower (defense) values to each other (meaning the attacker automatically gets hit back by the defender)

Cephalid Aristocrat gives you self-milling when its the target of spells or abilities, which

#7: Force of Negation This inclusion to the list at first can look like a bit of an eyebrow-raiser, but I think this card serves a valuable purpose if the Modern Horizons gives birth to degenerate Turn 2 or Turn 3 combo decks in the Modern format

If you can find a way to repeatedly untap it, you take infinite turns, as simple as that

most packs will have more Common cards than Uncommon, then Rares and finally if youre lucky Mythic Rare cards too

This is why the company has a dedicated branch called Research and Design whose job is to create new sets and come up with fresh mechanics