Cosmic Blast

Two strange bolts of eldritch power springs from the caster's finger tips.

While casting this spell the caster's mind is bombarded by strange cosmic whispers, the caster must succeed a constitution saving throw at the caster's own spell save DC, or else he won't be able to cast this spell again for 1d4 days and takes 2d10 necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.