Here's a bit of History: Spells.
Feel free to add or correct any information, or link any new entry to this post.
Thanks to Suikoman444 for this ant work!
November 22, 2002
Lightning
December 18, 2002
Salad Shooter
January 22, 2003
Whirlwind
April 9, 2003
Rain Storm, Fire Storm, Earth Strike.
May 27, 2003
Daybreak, Big Zap Attack.
June 10, 2003
Current Event, Shadowbat Swarm.
August 26, 2003
Cosmic Blaze, Ice Dragon Spirit.
October 28, 2003
Sonic Boom, Dark Lightning.
February 13, 2004
Heal Scratches, Heal Wounds
April 17, 2004
Four eye Blaster, Groglurk Rage, Water Dragon Blast, Moglin War Party.
April 19, 2004
Summon Skull, Summon Pixie.
May 17, 2004
Invisible Blast, Spectrum Swirl.
June 25, 2004
Light of Mana.
August 7, 2004
Blue Lightning.
August 17, 2004
Solar Incinerator.
October 18, 2004
Scrambler Beam.
December 1, 2004
Gift Box (2004)
January 1, 2005
Avalanche Slide, Avalanche Attack, Avalanche Extreme
March 24, 2005
Fireball Z, Whirl Tide, Star Forge.
June 15, 2005
Scale Rot
June 19, 2005
Light Blast
July 22, 2005
Summon Squirrel
August 11, 2005
Books of Scholars
August 17, 2005
Mana Regen
September 29, 2005
Mental Energy, Ice Needles
November 25, 2005
Gift Box (2005)
December 31, 2005
Slay Bells
April 11, 2006
Vortex, Meteors
June 1, 2006
Summon Energy Dragon, DarkSplatter, Summon Poelala
August 7, 2006
Ebil Pencil
September 6, 2006
Earth Fury
Earth Spikes
September 19, 2006
Riiiptide
Riptide
December 13, 2006
1st Day of Frostval
December 14, 2006
2nd Day of Frostval
December 15, 2006
3rd Day of Frostval
December 16, 2006
4th Day of Frostval
December 17, 2006
5th Day of Frostval
December 18, 2006
6th Day of Frostval
December 19, 2006
7th Day of Frostval
December 20, 2006
8th Day of Frostval
December 21, 2006
9th Day of Frostval
December 22, 2006
10th Day of Frostval
December 23, 2006
11th Day of Frostval
December 24, 2006
12th Day of Frostval
February 14, 2007
Candy Hearts
Insane Candy Hearts
March 8, 2007
Summon Krenos
May 24, 2007
Charm
May 27, 2007
Brilhado Feathers
June 7, 2007
Inferno, MegaInferno, Supernova
July 3, 2007
Dragons of Calladus, Jack Frost in the Box
August 2, 2007
Lick Wounds
October 4, 2007
Ninjat Madness
October 25, 2007
Pumpkin Patch 100, Pumpkin Patch 300
November 8, 2007
Shapeshift
November 15, 2007
Summon Diviara, Summon Galrick, Summon Giliara, Summon Eldron