Trunk expansion spell

Trunk expansion spell expands a trunk's inside room without changing the size of the trunk. Only Whisperer mages can cast this spell and it is additionally blood bound.

Strengths
The expanded trunk always retains its original weight despite even being filled with several tons of inventory. Additionally it is indestructible. Richard can make the length inside five time the length of the outside on the first ritual. The expanded trunk can at its largest only be a maximum of two meteres long and one meter wide. The smallest version can only measure 20 cm at each side. The spell is blood bound, making such trunks very valuable.

Limitations
The ritual itself takes a whole day to complete and you are additionally in need of wood materials as well as proper tools to build one. The trunk has to have a resembles to a chest, with a rectangular foundation and a curved lid. Further the ritual could not be used on pre-made trunks, forcing the caster to always learn how to build trunks in the first place.

Final ritual
Most likely allows the mage to create an own dimension, like Creakylid does.

Expanded trunks in usage

 * The father council owns one in Room 509, the official entrance to Creakylid.
 * Thomas received a miniature travelling trunk on his birthday by Richard, before he left towards Creakylid.
 * Richard Struggle travels with a miniature one.