Apprentice’s Spell Die
Wondrous Item, uncommon (requires attunement by a spellcaster)
This rough-hewn, die of bone is worn smooth at the edges. Its four runic inscriptions are stained dark from years spent in the pocket of a nervous young adept. Often crafted as an exercise by a student of the arcane, the runes on each of the four sides are imbued with the magical energy of its maker.
When the die is cast by a spellcaster, its own power can contribute to the strength of some types of spells.
As you cast a spell that has an “At Higher Levels” clause in its description, choose the spell slot level that you will use to cast the spell. Before any attack, saving throw, or damage rolls are made roll the Apprentice’s Spell Die as a somatic spell component of the original spell (use a d4 at the game table). Add a number of spell slot levels equal to the result on the die to the spell slot level you chose to cast your spell. Use the new, combined spell slot level to determine the effects of the spell, but only the original spell slot level is consumed. Once cast, the die remains inert and cannot be used again until the next midnight.