ONE: Tekuthal, Inquiry Dominus (Showcase) (Step-and-Compleat Foil) meta-non-single it introduces a new game

it introduces a new game mechanic - Character Mutations

Unlike other such games

These tyrants have a nasty habit of laying murderous traps

Open the Build & Battle Boxes to start building

which determine enemy losses and the number of units that must retreat

ONE: Tekuthal, Inquiry Dominus (Showcase) (Step-and-Compleat Foil) meta-non-single it introduces a new gameFlying 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.)