None of these cards have a regulation mark on them, and they are designed so that various cards can be used together as one deck, transcending the boundaries of the current Standard Regulations, Extra Regulations, and Hall of Fame Regulations
Chaos Orb can destroy any permanent that it touches, along with itself, once the physical card is flipped like a coin over the table
While limited to just finding artifacts and enchantments, Enlightened Tutor gives white decks a way to grab cards like Smothering Tithe or Overwhelming Splendor
Otharri is one I played against recently, and without disenchants for the anthems and without a wrath, the deck managed to get life totals moving quicker than me when I see a spider emerge from the crack in the sofa
Ziatora is guaranteed damage the turn it hits the field, and provides compensation to help you replace whatever Inferno Titan equivalent you just hurled at your opponents face
Not that that happens often, since the untap cost usually eats up an entire turns worth of mana