Den of the Bugbear (LIST-254) [The List Reprints]

If you control two or more other lands, Den of the Bugbear enters the battlefield tapped.

T: Add R.

3R: 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.