Relnor, The Unforgivable

When Relnor, The Unforgivable enters the battlefield, place 1 -X/-X counter on all Cyborg creatures other than Relnor, where X is equal to
their individual mana costs. This is
until Relnor leaves.
{u}{b}, {t}: Put a +X/+X counter on Relnor, The Unforgivable, where X equals the base power of
a random creature you control picked by rolling a
d20, in order of how you have them laid out.
While Relnor is out, 'Cyborg Mind
Bug' doesn't work.