Upon taking this feat a spellcaster can cast a spell without using a spell slot or having the the need for an available spell slot. The spell casts as normal, but drains the health of the caster.
Take damage equivalent to the level you cast your spell plus the number of d4 equivalent to the level cast.
Preform a constitution check DC 10 which you can add your spellcasting mod to. Upon fail your spell fails and you take double dice damage
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