Custom Ideas Help

I know I have brought these up before, some you may not remember, and some are even new, but I need some help on ideas on "How-To-Do"
First and mostly: Advanced Build Ability. I have seen the custom Spells map ideas, and the one with the using Spell book idea, Perhaps someone can develop a new way with some new triggers, or perhaps Jass:)
Second I been having probs trying to create a new item called Storm Hammer. What it simply does is the same as it normally would as a griff rider, but I want it able for any hero. Much similar to Orb of Fire, problem is I cant seem to get it to be able to throw hammers (like instead of fire), I been trying with a MK mostly cuz that what I want it for. I am hoping to make it Item without the use of triggers effecting it.
third and finally my good old Wind walk ability that let you stay in wind walk as long as u have Mana, much similar to Starcraft's personal Cloak ability. I figured out if we used the same method as immolation(SP) off the Demon Hunter that we could make it work.

I had more, but I cant seem to remember them, so I guess I'm gunna call this a post.

Wind walk - add an ability based off immolation
unit begins the effect on an ability
ability = winwalk(custom)
unit - add perminant ivisibilty to unit
unit - add movement speed bonus to unit(based off boots of speed)
Unit group - add unit to unit group windwalk

Every 1 seconds of gametime
unitgroup - pick every unit in windwalk and do actions
if picked unit has mana = 0 then
remove perminant ivis fro picked unit
remove move speed bonus from unit
reove unit from windwalk unit group
else

there you are, if you want to remove leaks, just convert to jass and add a local unit, and set it to null at the end of the script

Leaks? What leaks?

As for the storm hammer, you only need to alter the projectile art on the orb ability... however, that's just the art, the orb will still do what it does, I doubt you will be able to make it a missle(line) attack like the one of gryphon riders.

srely the picked unit leaks? shouldnt you set it to a variable? i dunno, im ot to good with recognising leaks, but then again, better safe than sorry
as for the storm hammer, you could make a custom caster to cast a modified shockwave that has no art, dealing a tiny amont of damage in the direction the attacking unit is facing

It's not the picked unit that leaks, it's the unit group you pick from. However, in this case, you are not creating a new group, but using an already existing one stored in a variable, so there is no leak.