Magic: the Gathering - Datenbank

Dwarven Hold enters the battlefield tapped. You may choose not to untap Dwarven Hold during your untap step. At the beginning of your upkeep, if Dwarven Hold is tapped, put a storage counter on it. [T], Remove any number of storage counters from Dwarven Hold: Add [R] to your mana pool for each storage counter removed this way.