Kalain, Reclusive Painter This is a tough category to narrow to one, but Kalain is the pick here because of the new archetype she helped fuel: red-black treasure
And Im not including Gauntlet of Power in this number, because its disingenuous to call a 5-mana artifact a ramp card Thats nearly a quarter of our nonland spells
Even 1 damage dealt to a creature from a source with deathtouch is considered lethal damage, so any amount greater than that will cause excess damage to be dealt, even if the total amount of damage isn't greater than the creature's toughness
Its easy for a niche card to be strong within its niche - and sometimes a card like that is simply so strong that it takes a deck from being a fun idea into a crushing way to play Commander - but its far rarer for a card to work in decks that its not intended for
As The Great Work, this saga can be a smaller board wipe, dealing three damage to an opponent and all their creatures
Great dual lands that will see play for years