Last Light of Durin's Day (HOB-103) - The Hobbit

Whenever a Mountain you control enters, put a quest counter on this enchantment. If it has six or more quest counters on it, sacrifice it. If you do, search your hand and/or library tor a Dragon card and put it onto the battlefield. If you search your library this way, shuffle.

Mountaincycling 2 (2, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)