Bifur, Melodic Rider 147 (The Hobbit)

Storied (If you control three or more artifacts, legendaries, and/or Sagas, you have an enduring story for the rest of the game.) Whenever Bifur enters or attacks, put a +1/+1 counter on target creature. As long as you have an enduring story, if an ability of a Dwarf you control triggers, that ability triggers an additional time.

NM - $2.00
LP - $1.60
MP - $1.20
HP - $0.80
DMG - $0.70