By using something like a Voltaic Key or other permanent that untaps another permanent, you can repeatedly take extra turns without giving up a turn
This culminated three years ago in a two part series I did on my Tumblr blog about the design of the Magic card frame: one looking at Eighth Edition through Rise of the Eldrazi and the other Scars of Mirrodin through Battle for Zendikar
This keeps your hand full and makes it so that you never run out of gas
Fate Unraveler, Underworld Dreams, Razorkin Needlehead, and Kederekt Parasite are all very similar, and theyre often seen in the same decks together
They tower over the surrounding vegetation in this artwork, which depicts the eeriness well
Sadly, this high price point is largely due to the cards rarity from being a Secret Lair card