As a result of these edge-case disagreements and the games breathtaking combination of longevity and publishing velocity, it is surprisingly challenging to answer what should be a fairly simple question
Crucially, many sit on the Reserved List a publisher's vow never to reprint them
And since most creatures that fit that description are unplayable elsewhere, you can pick up a deck full of them on the cheap
Its an interesting decision, and while its definitely one thats split the player base a little, it does make for an interesting time
You cannot normally cast things in your color identity, but with this, you can cast your foe's card draw, like Mulldrifter with evoke or Esper Sentinel
This lets Anikthea draw two cards when it comes into play, provided it has an enchantment to put into play, and draw an additional card each time it attacks