Here is some spells i found, some more overpowered than others and some just looks cool :P
Spell id - Spell Name
11 - Frostbold of Ages
23187 - Frost Burn
23965 - Instant Heal
29618 - Burning Brand
30522 - Nether Burn
32139 - Acidic Splash
35132 - Boom
36720 - Burn
36829 - Hell Rain
36935 - -5000 Attack Power buff on target
37091 - Rain of Bones (Sucks, but looks fun )
37667 - Magma Splash
37674 - Chaos Blast
38509 - Shock Blast
38285 - Spore Splash
38897 - Sonic Boom
38930 - Solarburn
38976 - Spore Quake
40080 - Booming Voice
40631 - Flame Blast
40736 - Death Blast
41245 - Soul Blast
41346 - Poisonous Throw
41966 - Earthquake
Enjoy
Zumzar