There's a "Script" tab as well, and you should copy/paste the script shown there in a file named Exori Blayz.lua located in spells/scripts/
<instant name="Exori Blayz" words="exori blayz" lvl="1" maglv="1" mana="25" exhaustion="1000" prem="0" needlearn="0" selftarget="1" blockwalls="0" aggressive="1" event="script" value="ExoriBlayz.lua">
<vocation id="4"/>
<vocation id="8"/>
</instant>
Try to use this as your xml:
Code:<instant name="Exori Blayz" words="exori blayz" lvl="1" maglv="1" mana="25" exhaustion="1000" prem="0" needlearn="0" selftarget="1" blockwalls="0" aggressive="1" event="script" value="ExoriBlayz.lua"> <vocation id="4"/> <vocation id="8"/> </instant>
Name your script ExoriBlayz.lua .
The space might cause it.
<instant group="attack" spellid="1000" name="Exori Blayz" words="exori blayz" lvl="1" maglv="1" mana="25" prem="0" needlearn="0" selftarget="1" cooldown="1000" groupcooldown="1000" script="ExoriBlayz.lua">
<vocation name="Knight"/>
<vocation name="Elite Knight"/>
</instant>