Mana Vault

{w}: Put a White Counter on Mana Vault.
{u}: Put a Blue Counter on Mana Vault.
{b}: Put a Black Counter on Mana Vault.
{r}: Put a Red Counter on Mana Vault
{g}: Put a Green Counter on Mana Vault.
You may remove a colored counter from Mana Vault to add one mana of the counter's color. You may do this up to three times per turn.