Gluttonous Troll dies, triggering Nim Deathmantle, causing you to pay ({4} magic symbol) to return Gluttonous Troll from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Gluttonous Troll enters the battlefield, it triggers, creating at least three Food, three Clue and three Treasure artifact tokens.
Activate the three Treasures by tapping and sacrificing them, adding ({3} magic symbol) .