Myst, Mother of Machines

Artifact creatures you control without
reconfigure gain reconfigure. The reconfigure
cost is equal to its mana cost. (Cost: Attach to
target creature you control; or unattach from a
creature. Reconfigure only as a sorcery. While
attached, this isn't a creature.)
Artifact creatures you control have "Equipped creature gets +X/+Y where X is this creatures
power and Y is its toughness."