Earth Elemental

Vigilance, trample
When Earth Elemental attacks, you may tap
any number of untapped mountains you control.
It gains +0/+1 for each mountain thus tapped.
Earth Elementals have the eternal strength of stone
and the endurance of mountains. Primordially
connected to the land they inhabit, they take a
long-term view of things, scorning the impetuous
haste of short-lived mortal creatures.