Many of the cards in Arabian Nights are a part of the Reserved List, a select handful of cards that are never going to be reprinted
R/G DinoMight 4 Deathgorge Scavenger 2 Ghalta, Primal Hunger 2 Glorybringer 4 Llanowar Elves 4 Merfolk Branchwalker 4 Regisaur Alpha 4 Rekindling Phoenix 1 Rhonas the Indomitable 3 Thrashing Brontodon 4 Abrade 1 Blossoming Defense 4 Struggle // Survive 3 Aether Hub 6 Forest 3 Hashep Oasis 5 Mountain 4 Rootbound Crag 2 Sheltered Thicket Sideboard 2 Aethersphere Harvester 2 Atzocan Archer 2 Carnage Tyrant 2 Chandra, Torch of Defiance 2 Lifecrafters Bestiary 2 Magma Spray 2 Sweltering Suns 1 Thrashing Brontodon I had been piloting an aggressive, curve-out Dinosaurs deck before the release of Dominaria , and similar lists had been putting up solid results in Leagues before the U/R God-Pharaohs Gift deck broke out
Since they are such a low cost, any deck can bring them out easily
Tear Asunder Flexibility is thy name Tear Asunder is a two-mana instant that lets you exile an artifact or enchantment
At the end of the exercise, there were 36 unique cards vying for their spot in Delver of Secrets decks (and on the day after I compiled my list, a 37th card, Cloudfin Raptor, made a single appearance)
There's almost always an artifact or enchantment you should exile, and discard payoffs are more and more prevalent that the card draw has little drawback