If you play Vanille when you only have four mana available and you can't drop a land before your turn ends, you won't have the necessary five mana to meld when the ability triggers on the first main phase of your following turn
This knight sees play in every vampire deck whether the commanders Edgar Markov or Elenda, the Dusk Rose
It's fantastic in Legacy because you have a plethora of fetches, but in cube it's much more rare to get a shuffle effect, let alone being able to pair it with Brainstorm
I say this is good design and that is because Dack is so nutty good in cube
Ichor Wellspring ain't no proper egg in that sense (it has no built-in sacrifice ability), but assuming your deck hangs out with an entourage like Braids, Arisen Nightmare or Daretti, Scrap Savant and you can reanimate artifacts, you can draw a lot of omelets with this one
Theres an angel token thats a 3/3 with flying