MTG >Combos >Maskwood Nexus +Den of the Bugbear +The Book of Exalted Deeds +

1. With Maskwood Nexus, Den of the Bugbear, and The Book of Exalted Deeds on the battlefield 2. Turn Den of the Bugbear into a creature. 3. Then activate The Book of Exalted Deeds's ability to put a counter on Den of the Bugbear, since the land has all creature types. You cannot lose the game and your opponents cannot win the game until Den of the Bugbear is destroyed.