Arcane Matrix

When you cast this spell, you create a spell matrix inside the diamond used as the spells material component. This matrix stores spells cast into it, holding them until the caster speaks a command word chosen at the time of the matrix's creation. The matrix can store up to 3 levels worth of spells. Any material components for these spells are consumed at the time of casting, but no effect happens immediately. 

When the command word is spoken, all spells stored in the matrix are cast on a single, appropriate target, chosen by the caster, simultaneously, and the gem that the matrix was created inside of is destroyed. For a spell to be cast from the spell matrix, the caster must have spell slots appropriate for those spells available when the command word is used. The spells use the caster's spell save DC and Spell Attack Bonuses.

The caster may only have one spell matrix active at a time. If the caster casts this spell while a spell matrix is already active, the original matrix is lost, along with any spells it stored, and the gem it was inside of is destroyed.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the number of spell levels that the matrix can store is increased by 1.