Two Point Strike

You may make a Light Attack against the target. On damage, you apply Wave Palm I. 

Wave Palm increases the mana cost of the afflicted target’s next action that uses mana by an amount equal to the amount of stacks applied. If the triggering attack makes the number of total stacks exceed the target's current mana, they lose mana equal to the amount of total stacks and take true damage equal to triple this amount. Wave Palm does not stack with itself, use only the higher value.

If the target has no mana, they immediately take true damage as if their stacks exceeded their current mana.

When the Wave Palm effect triggers, either by increasing the mana cost or by dealing the true damage, the Wave Palm effect is removed.