V'roth's Minion of Terror

V'roth's Minion of Terror enters the battlefield
with X +1/+1 counters on it.
Flying, intimidate
{t}: For each +1/+1 counter on V'roth's Minion
of Terror, add one mana of any color. Spend this
mana only to cast artifact spells or to activate
reaper abilities of creatures you control.