Block skill based on HP

[yukkimi0100]

How do I block a skill from being used only if the user's life is < or = a X%?
I tried to do it via onPcUseSkillEvent however this means that even if the skill is blocked, it goes on cooldown

[Playtester]

Look at how Magnum Break is done.

    Requires:
      HpCost:
        - Level: 1
          Amount: 20
        - Level: 2
          Amount: 20
        - Level: 3
          Amount: 19
        - Level: 4
          Amount: 19
        - Level: 5
          Amount: 18
        - Level: 6
          Amount: 18
        - Level: 7
          Amount: 17
        - Level: 8
          Amount: 17
        - Level: 9
          Amount: 16
        - Level: 10
          Amount: 16
      SpCost: 30

First you define a HP cost. You can also use "HpRateCost" for percentual cost.

Then you want to make sure the HP is only required but not consumed.

For this go to skill.cpp and find "void skill_consume_hpspap".

	switch (skill_id) {
		//Skills that require HP but do not consume them
	case SM_MAGNUM:
	case MS_MAGNUM:
		hp = 0;
		break;
	

Now you just need to add your skill here, so it doesn't consume the HP that it requires.