Tekuthal, Inquiry Dominus [Phyrexia: All Will Be One Prerelease Promos] Darkness[x2] You can only use each

You can only use each effect of "The Iris Swordsoul" once per turn

then if your LP are lower than your opponent's

Incandescent Ordeal

You can only use this effect of "Mementomictlan" once per turn

IF this card has "Number 105: Battlin' Boxer Star Cestus" as an Xyz Material

Tekuthal, Inquiry Dominus [Phyrexia: All Will Be One Prerelease Promos] Darkness[x2] You can only use eachSet: Phyrexia: All Will Be One Prerelease Promos Type: Legendary Creature Phyrexian Horror Rarity: Mythic Cost: {2}{U}{U} Flying If you would proliferate, proliferate twice instead. {1}{U P}{U P}, Remove three counters from among other artifacts, creatures, and planeswalkers you control: Put an indestructible counter on Tekuthal, Inquiry Dominus. ({U P} can be paid with either {U} or 2 life.)