Motherlode Guardian

Bestow on Land {4}{r} (If you cast this card for its
bestow cost, it's an Aura spell with enchant land. It becomes a creature again if it's not attached to a
land.)
As long as you control two or more Mountains,
this creature has flying.
Enchanted land has "{t}: Create a Treasure
token." and "Ward—Pay 4 life."
A living fireball that flies between mountains,
defending gold mines from the unworthy.