9 - Dawns Truce Half Surge of Salvation and half Teferi's Protection, Dawn's Truce allows protecting permanents and combos from removals, yourself from combos and other types of interactions for a lower cost than the most comprehensive card, but also greater than Surge of Salvation
This doesn't happen often, of the 20% of the time you get an opener with Chancellor you find that you don't have two manas worth of stuff that is better than one mana worth some of the time
Its a good size for a creature too, but Im mainly scared of that triple black casting cost
More pre-scripted game play derived before the games start, lowered risk for aiming for the best possible hand for the situation, more mulligans and time spent shuffling even by decks that aren't linear
Creatures, mostly, but Enchantments, Artifacts, Tokens, Lands, and Planeswalkers can all be Legendary
This saw the debut of the play booster, which gives you the chance to pull multiple rares from a single pack