concentration, 1 minute/mana

As two actions, a creature that you can touch or see within 10 meters starts experiencing a heart attack. At the start of each of its turns for the duration, the creature must make a Fortitude saving throw. If the creature is a construct or an undead, the spell has no effect on it.

On a failure, it takes 4d6 necrotic damage and is stunned until the start of its next turn.

On a critical failure, it takes twice as much damage.

On a success, it takes half as much damage and and the effect ends.

On a critical success, it takes no damage and the effect ends.

Augment
You can augment this spell with the following options, expending mana for each option.
  • You can increase the damage by 4d6 for each additional mana expended. If this spell is augmented to target additional creatures, this damage is halved.

  • You can target one additional creature for each additional mana expended. The creatures must be within 5 meters of each other when you target them.