Power Core

Supercharge—Whenever Power Core enters the battlefield or dies, choose power or shock. If you
choose power, attach two Equipment you control
to this creature. Otherwise, Power Core deals
X damage to each opponent, where X is the
amount of Equipment you control.
Whenever a creature you control attacks, if it has
an Equipment attached to it, you may pay {1}. If you do, attach target Equipment to
Power Core.