Sliver Brood Chamber

{t}Add one mana of any color 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
{t}Create X 1/1 Sliver tokens where X is the
amount of Brood Counters on Sliver Brood
Chamber (activate this ability only if you control
A sliver)
As the explorers traveled deeper the sounds of chittering seemed to surround them