The Driftwood Cathedral

The Driftwood Cathedral enters the battlefield tapped. During your end step, tap
The Driftwood Cathedral or pay 5 life.
Tap a creature: Put a Faith counter on The Driftwood Cathedral. Activate this ability only while The Driftwood Cathedral is untapped.
Remove X Faith counters from The Driftwood Cathedral: Add {x} to your mana pool. Spend this mana only to cast God creature spells.