2 abilities that need trigger work

1. my first ability is an aura that will slow and reduce armor of enemy units. I made an attempt at creating this but fail miserably... can someone help me out?

2. Haytoe has corrected me, so this is done. but I still need #1.

For #1 Not the greatest with Auras >.<

For #2 Why don't you use the game-time event?
~~~~~
EVENT: Game-Time of Day = 18
ACTION: Give Grim Reaper Perm. Invis.

~~~~~
EVENT Game-Time of Day = 6
ACTION Remove Perm. Invis. from Grim Reaper

~~~~~
That should work well.

1,make a copy from slow aura ability and (u can find it from turnado unit of Naga seawitch)rename it to "slowandreducearmoraura"
2,make a copy of Terrior Howl ability， and rename it to "reduce armor",change the cool down to 1 second and mana cost to 0, effect area match to the aura. remove buff and effect target.
3,prepare a unit named "assisstant unit" which has "reduce armor" ability and locust ability(witch can make the unit unselectable)
4,prepare a trigger with perioic event driven
even every 1.00 sec of game time
actions
unit group- pick ever unit in (playable map) and do
-if picked unit has ability of slowandreducearmoraura then
-create a assistant unit for owner of picked unit at position of picked unit
-hide last created unit
-order last crated unit to terriorhowl(i can;t remember the order string, pls check it by urself)
-remove last created unit

Why are you complicating matters? Just use tornado's slow aura together with a negative devotion aura. As far as I know the tornado's slow aura displays no icon, so you still get only one icon (from the devotion aura) on the command card, however, you will get two buff icons on affected units (I hope that's not a paroblem). Just make the devotion aura a hero skill and the tornado aura a unit ability, then use a trigger that whenever the hero learns the skill, it first checks if the skill was learned for the first time and if it was, then it gives the slow aura to the unit, otherwise just set the level of slow aura to the level of the devotion aura.

any way i could make it so theres only one buff?

You could use an imported black icon image.. You would still have the tooltip for the buff however, and it might cause a blank space between two other buffs if placed in between.

I just suppose limb has tested the nagtive devotion aura not works :(
For the buf, you can just use buff/effect editor to remove one of the buf icon.

Well, you could trigger the negative armor bonus by giving all units under the effect of the slow aura a negative armor bonus ability, and take away the ability when they are no longer under the effect of the aura.

for the 2 buffs:

why just not add the same buff to both spells, i mean on the field:

Data - Buffs

on both spells
then it will only show 1 of them, since its the same....

o btw, if you use a black icon for an buff, it will be like a small space between the buffs around the black icon buff.

edit: a negative devotion aura DO work, check the Targets Allowed.

it doesnt work for me, the second the hero learns the devotion aura, i give him the slow aura and then it crashes the second the enemy gets the buff... :\

probably becuase the buffs keep overwriting each other, seeing as they are passive. You'll just have to lump it and have 2 buff icons