You can activate the following Tools in the Building Entrance window (by selecting them in the Booster column on the right).
- Hot Embers: adds 2 pots of Hot Embers at the start of the level,
- Colored Crystal: adds a Colored Crystal at the start of the level,
- Jupiter's Lightning: adds 2 Jupiter's Lightnings at the start of the level.
When entering a level inside a Building, activate the tools you need to make them appear in the game.
To learn more, see the section 'What special Object combinations can I make?'.