Its not MUI

[Chamillionaire]

Why is this spell not MUI?

• EchoStompCast
  • Events
    • Unit - A unit Begins channeling an ability
  • Conditions
    • (Ability being cast) Equal to Echo Stomp
  • Actions
    • Set ESCaster = (Triggering unit)
    • Set ESCasterLoc = (Position of ESCaster)
    • Unit - Create 1 Tauren Chieften (Dummy) for (Owner of ESCaster) at ESCasterLoc facing (Facing of ESCaster) degrees
    • Set ESDummy[1] = (Last created unit)
    • Set ESDummyLoc = (Position of ESDummy[1])
    • Unit - Order ESDummy[1] to Night Elf Keeper Of The Grove - Tranquility
    • Unit - Add a 1.80 second Generic expiration timer to ESDummy[1]
    • Animation - Change ESDummy[1]'s vertex coloring to (100.00%, 100.00%, 100.00%) with 30.00% transparency
    • Countdown Timer - Start ESTimer as a One-shot timer that will expire in 1.60 seconds

• EchoStompCancel
  • Events
    • Unit - A unit Stops casting an ability
  • Conditions
    • (Triggering unit) Equal to ESCaster
  • Actions
    • Unit - Remove ESDummy[1] from the game
    • Custom script: call RemoveLocation (udg_ESCasterLoc)
    • Custom script: call RemoveLocation (udg_ESDummyLoc)

• EchoStompFinish
  • Events
    • Time - ESTimer expires
  • Conditions
  • Actions
    • Unit - Create 1 Tauren Chieften (Dummy Stomper) for (Owner of ESCaster) at ESCasterLoc facing (Facing of ESCaster) degrees
    • Set ESDummy[2] = (Last created unit)
    • Unit Group - Add ESDummy[2] to ESDummyGroup
    • Unit - Create 1 Tauren Chieften (Dummy Stomper) for (Owner of ESCaster) at ESDummyLoc facing (Facing of ESDummy[1]) degrees
    • Set ESDummy[3] = (Last created unit)
    • Unit Group - Add ESDummy[3] to ESDummyGroup
    • Unit Group - Pick every unit in ESDummyGroup and do (Actions)
      • Loop - Actions
        • Unit - Set level of Echo Stomp (Dummy Stomper) for (Picked unit) to (Level of Echo Stomp for ESCaster)
        • Animation - Change (Picked unit)'s vertex coloring to (100.00%, 100.00%, 100.00%) with 100.00% transparency
        • Unit - Add a 0.40 second Generic expiration timer to (Picked unit)
        • Unit - Order (Picked unit) to Orc Tauren Chieftain - War Stomp
    • Custom script: call RemoveLocation (udg_ESCasterLoc)
    • Custom script: call RemoveLocation (udg_ESDummyLoc)

 

[Pharaoh_]

Because it uses a timer. Timers don't provide MUI enhanced effects in GUI. Timers can result MUI effect only in Jass. Use a dummy unit and give it an expiration timer instead. When it dies, make the effects you want.

• Trigger
• Events
  • Unit - A unit dies
• Conditions
  • (Unit-type of (Triggering unit)) Equal to Dummy
• Actions
  • //Make your effects here, just like the trigger you posted

You also need hashtables or index system. ECaster is a global variable, so, it can't be MUI. You will need to save the caster to the dummy unit with the expiration timer, which will define the duration of the spell:

• Hashtable - Save handle of (Triggering unit) as Key(caster) of (Key(Last created unit)) in Hashtable