All "Runick" Quick-Play Spells can be activated only once per turn, and each allows choosing between one of two effects: a unique effect that provides consistency/disruption/Deck milling and then banishes a varied number of cards from the top of the opponent's Deck, or a shared effect to Special Summon 1 "Runick" monster from the Extra Deck to the Extra Monster Zone
It is a great option to tutor for, as you can use Tessera the Prime Squire (YGOrganization Translation) to progress your turn and allow you to summon another Squire when Tessera is sent to the GY
In fact, the best colorless cards MTG category is built on this very principle plus you get access to mana ramp, massive creatures, and board wipes that ignore the color pie
Vulcarrion meanwhile is crucial to unbricking your hand if they negate Pumpking there, as it can port into that (or Eldlich) to generate a body, and even resummon itself for free, being perfect as a Flying Mary material or requisite tuner
That said, these are decks that speak to my soul as a Magic player, so trust me
Learn more What the developers have to say: Why Early Access