Auto attack player with spell

[Leroy]

Okay so i dont want it to purposely attack players but if im attacked i want it to attack back with a spell. I know you can make it so it attacks them with auto retaliate but thats just my weapon, can i make it so it uses an attack spell without me knowing what the players name is?
Any help is appreciated,
thanks!

Edit:
Also, if someone could make a script in macro that auto says !bless everytime i log in (ex: after death).
thanks!

[Leroy]

BUMP. help

[MegaNo0body]

Add this macro to your auto-macros:
[macro]1000 {Attack Player with Spell} Target.Foe() Target.IsPlayer() Self.Mana()>100 Self.Say(exori frigo)[/macro]
This macro is configured to cast "Exori Frigo" if you're attacking a player and you have more than 100 mana. You can adjust the blue settings (100 and exori frigo).