Entrance to Caer Maul

Entrance to Caer Maul enters the battlefield with
10 dig counters on it. When an artifact enters the
battlefield remove a dig counter from Entrance to
Caer Maul.When this card has no dig counters on
it, transform it.
{t} Add {1} to your mana pool
Geon's journal pg. 231: "The needs of my research
demanded we dig deeper and find the source of the
mountains power"