(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield.
CR COLLECTOR'S RARE SR Super Rare Labrynth Set-Up X SPELL Quick-Play Target 2 of your "Labrynth" Spells/Traps that are banished or in your GY, except "Labrynth Set-Up"
For only three mana, you can tap [c]Arena[/c] to have a creature you control fight a creature an opponent controls of their choice
It draws a given number, in this case four for five mana, one more mana and card than Harmonize, Concentrate or Ambition's Cost
In the first place, even if you can reset in a disadvantageous situation, there are a lot of cards that activate GY in modern times, and even if you are lucky enough to reset, it is often reversed by his GY effect on the opponent's turn