Using Mutavault and Griffin Canyon to make an arbitrarily large Griffin
Heroic Intervention, Teferi's Protection or even an old school Withstand Death can go a long way towards having all those eggs which you just had to put in that one big basket actually survive
[48] [49] [18] Blue represents intellect, logic, manipulation, and trickery, and pulls its mana from islands
Any domain-related effects turn on instantly, turning cards like Leyline Binding and Herd Migration into the most effective versions of themselves
Contaminated Ground, Evil Presence, and Tainted Well are cheap ways to gift your opponents Swamps with a little extra card draw or life loss on the side, or use Reef Shaman and Dream Thrush each turn before you attack
Masterpiece Series MTG: Exceptionally rare, alternate-art foil versions of powerful cards, like the Kaladesh Inventions or Amonkhet Invocations