Melee Lightning effect needed!

I need a way to make it so that when you attack, up to 3 units (including the main target) is zapped with a chain lightning attack.

I also need a fairly simple way to do it, either by regular abilities (SLK) or through triggers (JASS).

example: Paladin has a lightning orb which does 5 lightning damage over 3 jumps. Paladin attacks zombie, zombie will take paladin damage, plus 5 lightning damage, and the other 2 zombies around the paladin will take 5 lightning damage.

Help will be greatly appreciated.

There is a unit ability named 'Lightning attack' like the Chimera. Use triggers to bounce off the main unit.

PS. How can I get your TFTWE that you made, your site says 'Expired Domain' and like 7 pop up ads :\

Create a new ability of the lighting orb ability, give it a 100 percent chance of attack with a skill (purge as default). Then create a chain lightning skill that does 5 damage to 3 targets. Then in the skill field for new lightning ability based off of the lightning orb ability, give it the weak chain lightning ability instead of purge. Simply just put the new lightning ability on an item and give to the hero and it will cast the chain lighting every time it attacks. Heres a little map I made for ya.

Pasmerga, use UMSWE now, TFTWE and UMSWE have merged.
My domain has expired, and I have no need to renew it yet.

Iceybro ill try this.

EDIT: Yes, this is exactly what I was looking for, many thanks to you. Credits added.