Buried Treasure Map

Buried Treasure Map enters the battlefield with
X treasure counters.
{x}{x}{r}: Create X treasure tokens, where X is
the number of treasure counters on this artifact.
Then, remove a treasure token from this artifact.
As soon as Vraska saw it, she knew that her search
was coming to an end. The City was near, and if it
wasn't, well, then she would know...