Spell Dual Casting

In this world, some spell casters have further researched weaving magical energy into their spells, as if the spell's weave is pre-mapped out to incorporate the casting of another spell at the same time.

For a number of times equal to their proficiency modifier, this feat allows the user when casting a spell as an action, to also cast a lower tiered spell, that you have prepared, simultaneously. Both spells must be of the same school and must also target the same target. And the usual rule applies that you can not hold concentration on 2 spells. Casting the two spells this way consumes both spell slots, and needs the somantic / verbal / material components of both spells (if any) to work.

Where it works: ~ you can use this feat to cast spells that requier both somantic and verbal components at the same time.

Where it doesn't: ~ you can not use this feat if your hands are tied, so you use a "main" spell that does not use somantic components, but your "bonus" spell does use somantic components. 

For the first time you take this feat you are only able to cast cantrips as your "bonus" spell, however, if you take this feat again, you can now cast up to 2nd level spells using this feat. Each time you continue to take this feat, the maximum spell your bonus spell can be cast increases by 2. However, you can not use this feat to cast 2 spells of the same level, your "bonus" spell must always be 1 level or more, lower than your "main" spell.