Blood Sacrifice (curse series)

You summon a giant mouth connected to a massive chain that comes out of the ground and eats your target. The target is dealt 200 hp but you are brought to 1 hp and all stats are reduced by 30% rounded down. This is the cost of using such a spell. A remove curse spell used with a 6th level spell slot or higher is able to remove the curse, otherwise the spell removes half of it and would need to until the next dawn to remove the other half.