SCP-015, The Pipe Nightmare

SCP-015 Enters the battlefield tapped and with 2
Pipe Counters on it.
{t}: Add one mana of any color to your mana pool
for each Pipe Counter on this card. This mana
can only be spent to cast SCP spells.
{3}, {t}: Sacrifice a land you control, add 1 Pipe
Counter to this card.