Level 1: MP -8 Wep atk and Mag atk +1 for 54 seconds
Level 6: MP -10 Wep atk and Mag atk +3 for 144 seconds
Level 11: MP -13 Wep atk and Mag atk +5 for 244 seconds
Level 16: MP -16 Wep atk and Mag atk +8 for 344 seconds
Level 20: MP -16 Wep atk and Mag atk +10 for 400 seconds

Level 1: MP -10 Basic Attack 20 Mastery 15%
Level 10: MP -13 Basic Attack 30 Mastery 35%
Level 20: MP - 20 Basic Attack 40 Mastery 60%

This is basically a magician version of the warriors slash blast

Level 1: All skills use 1% less MP
Level 10: All skills use 10% less MP
Level 20: All skills use 20% less MP

Level 1: MP -15 Magic damage -11% for 15 seconds
Level 10: MP -15 Magic damage -20% for 150 seconds
Level 20: MP -30 Magic damage -30% for 300 seconds

Level 1: MP -70, 20% success rate, Duration: 4 seconds, Cooldown: 5 mins
Level 10: MP -52, 30% success rate, Duration: 6 seconds, Cooldown: 5 mins
Level 20: MP -32, 40% success rate, Duration: 8 seconds, Cooldown: 5 mins
Level 30: MP -12, 40% success rate, Duration: 10 seconds, Cooldown: 5 mins

Level 1: MP -34, Base Attack: 80, Duration: 100 seconds
Level 10: MP -40, Base Attack: 100, Duration: 120 seconds
Level 20: MP -44, Base Attack: 120, Duration: 140 seconds
Level 30: MP -50, Base Attack: 140, Duration: 160 seconds

Level 1: MP -15 Magic damage -11% for 15 seconds
Level 10: MP -15 Magic damage -20% for 150 seconds
Level 20: MP -30 Magic damage -30% for 300 seconds

Level 1: MP -14, Basic Attack: 28, Mastery 15%
Level 10: MP -14, Basic Attack: 55, Mastery 30%
Level 20: MP -28, Basic Attack: 85, Mastery 45%
Level 30: MP -28, Basic Attack: 115, Mastery 60%

Note: Most holy resistant monsters are weak to darkness (eg. Star Pixies) with some exceptions (eg. bosses). Basically this attack is similar to Fire Arrow with the exception that it's 5 attack weaker.
Originally I planned to name Dark Arrow into Fel Arrow but it sounds so copied from WoW so I changed the name.

Level 1: MP -1 every second, Basic Attack: 1, Mastery 15%
Level 10: MP -5 every second, Basic Attack: 10, Mastery 30%
Level 20: MP -10 every second, Basic Attack: 20, Mastery 45%
Level 30: MP - 15every second, Basic Attack: 30, Mastery 60%

This skill is unique for a 2nd job ability. Like the bowmasters hurricane, it activates when the key is pressed down and damages the enemy after every second as well as pulling them closer towards the mapler.

Level 1: MP -12, Summoned Monsters damage +10%
Level 10: MP -18, Summoned Monsters damage +10%
Level 20: MP -30, Summoned Monsters damage +20%

Level 1: Summoned Monster time increased by 2%
Level 10: Summoned Monster time increased by 20%
Level 20: Summoned Monster time increased by 40%
Level 30: Summoned Monster time increased by 60%

Level 1: MP -50, 48% HP lost over 60 seconds
Level 10: MP -40, 40% HP lost over 60 seconds
Level 20: MP -35, 30% HP lost over 60 seconds
Level 30: MP -30, 20% HP lost over 60 seconds

Level 1: MP -16, Weapon and Magic defense reduced by 2
Level 10: MP -16, Weapon and Magic defense reduced by 20
Level 20: MP -24, Weapon and Magic defense reduced by 40

You'd thought this skill was similar to the DKs Dragon Road didn't you?

Level 1: MP -100, Base Attack: 100, Duration: 130 seconds
Level 10: MP -80, Base Attack: 120, Duration: 140 seconds
Level 20: MP -60, Base Attack: 140, Duration: 150 seconds
Level 30: MP -40, Base Attack: 160, Duration: 160 seconds

Level 1: MP -120, Base Attack: 140, Duration: 80 seconds
Level 10: MP -100, Base Attack: 160, Duration: 100 seconds
Level 20: MP -80, Base Attack: 180, Duration: 110 seconds
Level 30: MP -60, Base Attack: 200, Duration: 120 seconds

Level 1: MP -16, Weapon and Magic defense reduced by 2
Level 10: MP -16, Weapon and Magic defense reduced by 20
Level 20: MP -24, Weapon and Magic defense reduced by 40

You'd thought this skill was similar to the DKs Dragon Road didn't you?

Level 1: MP -50, 42% chance of reversing the mobs weaknesses and resistances.
Level 10: MP -40, 60% chance of reversing the mobs weaknesses and resistances.
Level 20: MP -35, 80% chance of reversing the mobs weaknesses and resistances.
Level 30: MP -30, 100% chance of reversing the mobs weaknesses and resistances.

Note: If the monster is weak or resistant to nothing then nothing happens unfortunately. Also this does not apply to monsters who are weak to heal.

Level 1: Base attack 300, Exp bonus on retribution 55%, Cooldown: 1 hour
Level 10: Base attack 400, Exp bonus on retribution 100%, Cooldown: 45mins
Level 20: Base attack 500, Exp bonus on retribution 150%, Cooldown: 30 mins

Level 1: MP -21, Base Attack 60, Attack Range 110%
Level 10: MP -30, Base Attack 80, Attack Range 140%
Level 20: MP -40, Base Attack 100, Attack Range 170%
Level 30: MP -50, Base Attack 120, Attack Range 200%

Level 1: MP -16, Base Attack 20, HP reduced by 10% of max HP
Level 10: MP -24, Base Attack 40, HP reduced by 20% of max HP
Level 20: MP -32, Base Attack 60, HP reduced by 30% of max HP
Level 30: MP -40, Base Attack 80, HP reduced by 40% of max HP

Level 1: MP -25, Max Attack 120, 1% MP drained
Level 10: MP -25, Max Attack 210, 10% MP drained
Level 20: MP -40, Max Attack 310, 20% MP drained
Level 30: MP -50, Max Attack 410, 30% MP drained

Level 1: Summoning time increased by 62%
Level 10: Summoning time increased by 80%
Level 20: Summoning time increased by 100%
Level 30: Summoning time increased by 120%

Level 1: MP -140, MP cost reduced by 12%, Lasts 5 mins, 40min Cooldown Time
Level 10: MP -120, MP cost reduced by 20%, Lasts 5 mins, 30min Cooldown Time
Level 20: MP -100, MP cost reduced by 30%, Lasts 5 mins, 20min Cooldown Time
Level 30: MP -80, MP cost reduced by 40%, Lasts 5 mins, 10min Cooldown Time

Note: (Yes I know I'm very bad at coming up with names)

Level 1: -50% HP and MP, Buff Duration: 10mins, 50mins Cooldown Time
Level 10: -40% HP and MP, Buff Duration: 20mins, 40mins Cooldown Time
Level 20: -30% HP and MP, Buff Duration: 30mins, 30mins Cooldown Time
Level 30: -20% HP and MP, Buff Duration: 40mins, 20mins Cooldown Time

Level 1: MP -13, Base Attack 113 for 15 seconds
Level 10: MP -40, Base Attack 140 for 60 seconds
Level 20: MP -70, Base Attack 180 for 110 seconds
Level 30: MP -100, Base Attack 230 for 160 seconds

Note: I originally called this skill Dark Bahamut but I changed it coz it sounds more of an anti-bishop. As Tiamat is the counterpart and the exact opposite to Bahamut, I chose that name. .

Level 1: MP -1000, 20min Cooldown Time
Level 10: MP -1500, 15min Cooldown Time
Level 20: MP -2000, 10min Cooldown Time
Level 30: MP -2500, 5min Cooldown Time

The reason the MP cost is very high (not as high has Meteor, Blizzard and Genesis) is because I consider this skill cheap along with my friends who've seen this.

Level 1: MP -25, Max Attack 120, 1% MP drained
Level 10: MP -25, Max Attack 210, 10% MP drained
Level 20: MP -40, Max Attack 310, 20% MP drained
Level 30: MP -50, Max Attack 410, 30% MP drained

Level 1: 25% of total MP recovered, 200% damage taken if hit during recovery.
Level 10: 30% of total MP recovered, 164% damage taken if hit during recovery.
Level 20: 35% of total MP recovered, 133% damage taken if hit during recovery.
Level 30: 40% of total MP recovered, 112% damage taken if hit during recovery.

Level 1: MP -25, 30% success rate, 6 second duration
Level 10: MP -25, 40% success rate, 10 second duration
Level 20: MP -40, 50% success rate, 15 second duration
Level 30: MP -50, 60% success rate, 20 second duration

Level 1: MP -30, Base Attack 140, 20% extra damage for every buff
Level 10: MP -30, Base Attack 160, 30% extra damage for every buff
Level 20: MP -45, Base Attack 180, 40% extra damage for every buff
Level 30: MP -50, Base Attack 200, 50% extra damage for every buff

Note: If you don't understand how this skill works, here's an example:
(Lustar Pixies for example are notorous for their annoying super magic defense and magic attack buffs. If the skill is maxed and if the pixie is annoying with those two buffs, the skill will have around 400 base attack deal to the pixie which is close to Level 1 Genesis =3)

Level 1: MP -16, Basic attack 123, Mastery 15%
Level 10: MP -16, Basic attack 150, Mastery 30%
Level 20: MP -24, Basic attack 190, Mastery 45%
Level 30: MP -25, Basic attack 240, Mastery 60%

Note: Yes this skill is EXACTLY the same as Angel Ray with the exception it applys dark based damage instead of holy.

Level 1: MP -2100, Basic attack 330
Level 10: MP -3000, Basic attack 420
Level 20: MP -4000, Basic attack 520
Level 30: MP -3500, Basic attack 570

Note: Again, this skill is EXACTLY the same as an existing skill but this time similar to Meteor and Blizzard with the exception it applys dark based damage instead of ice or fire. Also do take note that Sorcerers have Elemental Amplification as well thus its damage is weaker than Genesis.