Number Evail Normal Spell If only your opponent controls a monster Special Summoned from the Extra Deck: Reveal 4 "Number" Xyz monsters from your Extra Deck with different Ranks, then Special Summon 1 "Number" Xyz monster from your Extra Deck whose "Number" in it's name equals the total of those 4 monster's "Number"s (this is treated as an Xyz Summon), and if you do, attach the 4 revealed monsters as material, also you cannot Special Summon monsters while you control that face-up monster, except "Number" monsters
A free look at the top five cards of your deck and a chance to put Primeval Titan into your hand is wildly powerful
Auras like Ethereal Armor, Battle Mastery, and Timely Ward can make Zur more formidable for an expedited win
As I said, this format is defined by the pursuit of subjective goals over competitive advantages
Reincarnation chaining to a Multifaker activation can be deadly as it is a hard Once per Turn effect and trying to stall out is inevitable as Trickstar Lightstage forces activations which may be premature
Your opponent chooses 1 random card in your hand and calls the card type (Monster, Spell, or Trap), and if they call it wrong, return the attacking monster to the hand