Lava Tubes

Land -
Lava Tubes doesn't untap during your untap step if it has a depletion counter on it. <CR>
At the beginning of your upkeep, remove a depletion counter from Lava Tubes. <CR>
{T}: Add {B} or {R} to your mana pool. Put a depletion counter on Lava Tubes.

Land -
Lava Tubes doesn't untap during your untap step if it has a depletion counter on it. <CR>
At the beginning of your upkeep, remove a depletion counter from Lava Tubes. <CR>
{T}: Add {B} or {R}. Put a depletion counter on Lava Tubes.

Land -
{T}: Add {B} or {R} to your mana pool. Lava Tubes doesn't untap during its controller's next untap step.

Land -
Lava Tubes doesn't untap during your untap step if it has a depletion counter on it. <CR>
At the beginning of your upkeep, remove a depletion counter from Lava Tubes. <CR>
{T}: Add {B} or {R} to your mana pool. Put a depletion counter on Lava Tubes.