There are multiple creatures that draw you cards when they enter , and make for great blink targets to get to your key cards quicker
Maybe I'll move Cayth to a better rank in the future
Unless your opponents can counter the 'hoof, or deploy a board wipe or fog effect at instant speed, they're toast
This means that, while you're often going to evoke this while tapped out to keep a pesky threat, like an opposing commander, off the board, you can also just play this to eat a smaller creature that foolishly strayed into combat thinking you had no blockers
If the top card of your library is a land card, you may choose to put it into your hand rather than onto the battlefield tapped
For your enjoyment/research, here is this weeks Scryfall search