How to make non-area Efeckt to Area effect?

[Valter11111]

How to make(example) lifestealing to area effect. that it shows the area where it will drain it?

 

[darkrider]

you have to use any AoE (area of effect) based spell like rain of fire, death and decay, summon infernal, etc...

then you have to create dummy units that will cast life drain on several targets inside the AoE

 

[Airandius]

Just base a spell of Channel, edit it to your wishes, then when somebody casts your spell run the triggers (so yes make triggers) to do your actions.

Pick all units in 400 range of point of casting and create a dummy that casts for example holy light, to make a AoE holy light spell.

 

[Valter11111]

Deamn, i cant handle it.... how to make a dummy?

 

[Airandius]

Deamn, i cant handle it.... how to make a dummy?

A dummy is a unit that does nothing, has no model etc.
You add the spell you want him to cast (0 mana and 0 cooldown for the dummy spell btw) and make him cst it.

You need advanced triggering and it's better to use jass for custom spells.
You can also make it in GUI but that;s not very efficient.

EDIT: you also need to clean leaks in custom spells or your map might lag a lot or crash.