Visions of Dominance

Put a +1/+1 counter on target creature, then
double the number of +1/+1 counters on it.
Flashback {8}{g}{g}. This spell costs {x} less to
cast this way, where X is the greatest mana value
of a commander you own on the battlefield or in
the command zone. (You may cast this card from
your graveyard for its flashback cost. Then exile it.)