Because damage remains marked on a creature until the damage is removed as the turn ends, nonlethal damage dealt to a creature may become lethal if Eye of Nidhogg becomes attached to it or unattached from it during that turn
Once you've assembled plenty of Towns and other nonbasic lands, cast Omega, Heartless Evolution to turn the tides of battle
Wizards of the Coast has opened a proverbial Pandora's Box
We wrote a whole article that covers everything here, but in summary: October Booster packs re stock in North America for LGS
Love this in all of the places that can use ramp or Artifacts to sac for cards
// Vigilance On turns where the effect of Summon: Yojimbo's second or third chapter ability is applying, your opponents can choose not to attack with a creature that must attack if able as long as there is no other player, planeswalker, or battle for that creature to attack that wouldn't require a cost