Sophon, Keeper of Symmetry

Protection from creatures with unequal power and toughness

Whenever you cast a creature spell, if its power,
toughness, and mana value are equal, copy that
spell. This ability triggers only once each turn. (A
copy of a creature spell becomes a token.)

"I feel nothing but pity for these abominations. Fear
them not, loyal followers. In time, this world will be
our mirror image."