As always, good luck and have fun
Dishonourable Mentions Prismatic Ending I never thought wed see the day when Wizards of the Coast printed another White removal spell that could join Swords to Plowshares as a four-of in Legacy
Secret Arcade, Nylea's Colossus, Thoughtrender Lamia, Ondu Spiritdancer, and Sphere of Safety give you huge advantages with tons of +1/+1 counters, forced discard, or the hinderance of attacks to name a few
Utilizing life and creatures as resources, black can outpace opponents in card advantage, turning the tide of the game by sheer volume of options available each turn
The damage triggers The Red Terror, which gets a counter
In her 2006 book Millennial Monsters , Anne Allison mentions the card suit and writes, within parentheses, that it "was eventually settled out of court"