Troll of Khazad-dûm is a common Creature — Troll card from The Lord of the Rings: Tales of Middle-earth (LTR), collector number 562. Current market price: $5.58 (foil $8.85), TCGplayer market prices via Scryfall.
This creature can't be blocked except by three or more creatures. Swampcycling {1} ({1}, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)
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