Most of our single cards are second-hand, carefully checked, but some can also come directly from recent openings.
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: Until end of turn, Den of the Bugbear becomes a 3/2 red Goblin creature with "Whenever this creature attacks, create a 1/1 red Goblin creature token that's tapped and attacking." It's still a land.
D&D: Adventures in the Forgotten Realms
D&D: Adventures in the Forgotten Realms Extras