Erebor Armory

Erebor Armory enters the battlefield with three
+1/+1 counters on it.
{t}: Move a +1/+1 counter from Erebor Armory
onto target creature. Activate only as a sorcery.

"Mithril! It could be beaten like copper, and polished
like glass and the Dwarves could make of it a metal,
light and yet harder than tempered steel. Its beauty
was like to that of common silver, but the beauty of
Mithril did not tarnish or grow dim." —Gandalf