Sliver Brood Chamber

{t}: Add one mana of any color to your mana
pool Spend this mana only to cast or activate an
ability of a Sliver you control
{1},{t}: Put a Brood Counter on Sliver Brood
Chamber
{3},{t}: Remove X Brood Counters from Sliver
Brood Chamber then Put X 1/1 Sliver tokens
onto the battlefield activate this ability only if you control A Sliver