Alpharael, Dreaming Acolyte provides valuable card advantage in decks built around artifacts, maintaining your hand size while keeping up on board
You need to surround Kels with powerful death triggers to make it work since the activated ability wont win the game
Especially if you can leverage him to play an item from your discard, where he is effectively drawing and playing you a card for free
You need to kill Ajani, at which point your opponents up cards because they still have the Cat Warrior token, but you cant just kill the cat because then they get Ajani, Nacatl Avenger, which threatens to run away with the game
A canny Steelsong player can be singing by turn 3, wiping their opponents' slate clean while racking up lore at an obscene pace via Sleepy's Flute
However, there are just 4 unique new Fabled cards, with 2 copies of Aurora Holding Court for 5 total