Advanced Search Sets Random Syntax Agonasaur Rex Akim, the Soaring Wind Alpha Tyrranax Amped Raptor Ancient Brontodon Ancient Imperiosaur Annoyed Altisaur Apex Altisaur Armasaur Guide Armored Kincaller Balamb T-Rexaur Belligerent Brontodon Belligerent Regisaur Belligerent Yearling Bellowing Aegisaur Blue, Loyal Raptor Bonded Horncrest Bonehoard Dracosaur Bronzebeak Foragers Burning Sun's Avatar Cacophodon Carnage Tyrant Cavern Stomper Charging Monstrosaur Charging Tuskodon Cherished Hatchling Chizak, Apex Arachnosaur Cloudpiercer Colossadactyl Colossal Dreadmaw Compy Swarm Crested Herdcaller Cresting Mosasaurus Curious Altisaur Deathgorge Scavenger Deathmist Raptor Devil Dinosaur Dinosaur Egg Dinosaurs on a Spaceship Dinotomaton Displaced Dinosaurs Dracosaur Auxiliary Dread Osseosaur Dromosaur Drowsing Tyrannodon Earthshaker Dreadmaw Etali, Primal Conqueror Etali, Primal Sickness Etali, Primal Storm Feisty Stegosaurus Flaming Tyrannosaurus Frenetic Raptor Frenzied Raptor Frilled Deathspitter Fungusaur Gert and Old Lace, Runaways Ghalta and Mavren Ghalta, Primal Hunger Ghalta, Stampede Tyrant Giant Cindermaw Gigantosaurus Gishath, Sun's Avatar Gnathosaur Gold-Forged Thopteryx Goring Ceratops Grazing Whiptail Grim Giganotosaurus Harnessed Snubhorn Huatli's Raptor Huatli's Snubhorn Hulking Raptor Hunting Velociraptor

As with many other 3-mana instants, it's fairly cheap and hits several types of permanents
In the first generation, they were considered to be unfairly powerful and it is assumed that Dark-types, which are immune to Psychic-types, were introduced to balance the gameplay
Barad-dur and other legendary lands - People love legendary lands, especially when theres very little drawback to playing them
Very nice quality