best split second cards mtg Top Ten in Casual Play Split Second (the Card) :

Shantotto, Tactician Magician and The Emperor of Palamecia each care about the amount of mana spent to cast them

In a deck that will likely run Lanterns and Doc, you could fairly consistently have this card out as early as turn 4

Unique Flair 1920s art deco + mafia families

The Artifacts of Ice Age: Behold the Power of Artifacts Ice Age gave its best to all decks of any color in the form of powerful Artifacts: Jesters Cap and Mask, Zuran Orb, the return of Icy Manipulator, Naked Singularity and many others

Of all the new synergies with Faithless Looting since it was banned in Modern, its ability to flip Tamiyo, Inquisitive Student for just one mana looks to be the best