Max, the Daredevil gets haste, and whenever you cast your second spell each turn, you untap a creature and create a clue token
Unfortunately, with only a couple dozen split second spells available, and no synergistic payoffs for using them, they're a niche tool they see limited use
Yuna & Bahamut of Final Fantasy X Farewell from Final Fantasy X IYKYK *sniff
SuperDuperDani's breathtaking God Box may have been a printing error, or perhaps it was simply a stroke of extremely good luck
It is all its own
To be clear, though, the two are very different cards and the main (only) resemblance is the mana cost and power and toughness, but even still Im a believer in Walking Ballista