wander how to make a complicated skill

Hi everyone and sorry for bad English!
Im newbie here and get trouble with my skill, i dont know how to make it, here is some example:
1. Fire sword : deal dame to an enemy with 2 slash, 1 hit do normal damage, and 1 hit do element dame.
2. Thunder first : punch an enemy, 1 hit only, popup 50 normal damage, right after it popup bonus 20 element electro damage.
3. Final fantasy limit : a skill that hit an enemy 10 times(normal dame) , and after 9 hit with 10 damage per hit, the 10th do 80 damage.
I take many hours on google and cant find the answer, so i had to write this thread. I saw Yep_skillcore, but it not able to make my skill.
Did i miss something?
Did anyone make that kind of skill with RPG maker MV before?
Any suggestions?

All three of your requests can be completed with Yanfly's Three Action Sequence Plugins. I suggest you research them and the associated documentation thoroughly. After you do, and you have a general understanding of the plugin works, you will be able to create these skills on your own. For now, here are some basic instructions on how each skilled would be performed.

namto11 said:

1. Fire sword : deal dame to an enemy with 2 slash, 1 hit do normal damage, and 1 hit do
element dame.

This requires two separate damage formulas. There are a few ways to change a damage formula mid action sequence, but I recommend using variables. In your damage formula, you would write:

Code:

(v[x] == 0) ? (a.atk * 4 - b.def *2) : (a.mat * 4 - b.mdf * 2)

Where x = an unused variable number.

In your action sequence, you would write:

Code:

Change Variable x = 0
Action Effect
\\This makes the first hit use physical power.
Change Variable x = 1
Action Effect
\\This makes the second hit use magical power.

You would have to populate the space in between with animations, waits, etc. That is why I suggest familiarizing yourself with the plugins.

namto11 said:

2. Thunder first : punch an enemy, 1 hit only, popup 50 normal damage, right after it popup bonus 20 element electro damage.

This only needs one damage formula if you intend to keep the damage a flat 20. In which case, for the 20 damage, you would write the following.

Code:

Add Element: x
\\where x is the ID of the Thunder element.
HP -20: target, true
Clear Element

I believe you also need Yanfly's Element Core for these note tags to work.

namto11 said:

3. Final fantasy limit : a skill that hit an enemy 10 times(normal dame) , and after 9 hit with 10 damage per hit, the 10th do 80 damage.

This one is very simple. You write an Action Sequence where you hit 10 times. Before the 10th hit, you write the following:

Code:

Damage Rate: 800%
Action Effect: Target
Damage Rate: 100%

None of this is going to make sense to you if you don't do thorough research on the Action Sequence packs. So once again, I highly suggest that you do that.

Good luck.

Edit: By the way, if you're a beginner and new to the engine entirely, I suggest you avoid complex plugins like this for a while. Explore the engine and the options available to you. Give yourself a firm understanding before jumping into something complex.