Killing creatures by reducing their toughness to or below 0 (giving them -X/-X, in other words) is a deeply black mechanic
Even if they might stick out like sore thumbs among the rest of your cards, theyll still become an integral part of the metagame until they rotate out, and theyre fun to use
WotC did not lay out a schedule for these patches in their announcement, but did indicate they would be active between set releases, and that they intend to rebalance cards on a more frequent basis to keep the format fun, fast and dynamic. Re-balanced versions of Standard cards will be differentiated with the MTG Arena stamp next to their name
you can't cast it without sacrificing a creature, and you can't sacrifice additional creatures
During special events, some missions reward players with promo packs, and some Wonder Picks have promo cards
One thing you love when you pilot a white deck is being able to keep things in order during your turn, and no card says that loud and clear like this legendary shield