Summoner in Final Fantasy XI able to call summon creatures for a period of time to assists them in battle. There are eight summon in Final Fantasy XI, all with it's own technique and specialty which as follow.
Ifrit
Skills :
Inferno ( Burning hot flames are thrown at the enemy. This causes heavy fire-elemental
damage on cretures.)
ABILITY LIST :
Lv 1 - Punch - MP 9 - Physical Damage
Lv 10 - Fire II - MP 24 - Fire Damage
Lv 23 - Burning Strike - MP 48 - Fire Damage
Lv 30 - Double Punce - MP 56 - Attack Twice
Lv 38 - Crimson Roar - MP 84 - Raises Party's ATK Power
Lv 60 - Fire IV - MP118 - Fire Damage
Lv 70 - Flame Crash - MP164 - Physical Attack
Shiva
Skill :
Diamond Dust( Shiva creates a block of ice around the enemy causing ice-elemental damage.)
ABILITY LIST:
Lv 1 - Axe Kick - MP 10 - Physical Attack
Lv 10 - Blizzard II - MP 24 - Ice Damage
Lv 28 - Freeze Armor - MP 63 - Mass Ice Spike
Lv 39 - Sleepga - MP 56 - Mass Sleep Status
Lv 50 - Double Slap - MP 96 - Attack Twice
Lv 60 - Blizzard IV - MP118 - Ice Damage
Lv 70 - Rush - MP164 - Attack Five Times
Titan
Skill :
Ground Fury (Titan crushes his fist against the ground, causing a massive earthquake. The quake inflicts massive earth-elemental damage.)
ABILITY LIST:
Lv 1 - Rock Throw - MP 10 - Ranged ATK Effect: Slow
Lv 10 - Stone II - MP 24 - Earth Damage
Lv 21 - Rock Buster - MP 39 - Effect: Bind
Lv 35 - Mega Lift Throw - MP 62 - Ranged ATK Effect: Slow
Lv 46 - Earthen Ward - MP 92 - Mass Stoneskin
Lv 60 - Stone IV - MP118 - Earth Damage
Lv 70 - Mountain Crash - MP164 - Attack Three Times Effect: Bind
Carbuncle
Skill :
Shearing Light (Carbuncle produces a beam of light which casts Reflect magic on all party members.)
ABILITY LIST:
Lv 1 - Healing Ruby - MP 6 - Recover Target's HP
Lv 5 - Poison Nail - MP 11 - Effect: Poison
Lv 24 - Shining Ruby - MP 44 - Mass Protect + Shell
Lv 44 - Glittering Ruby - MP 62 - Raises Stats of Party
Lv 55 - Meteorite - MP108 - Light Damage
Lv 65 - Healing Ruby II - MP124 - Recover Party's HP
Ramuh
Skill :
Judgment Bolt (Ramuh brings thunder and lightning down from the sky. The bolts come down on the enemy for powerful lightning-elemental damage.)
ABILITY LIST:
Lv 1 - Shock Strike - MP 6 - Effect: Stun
Lv 10 - Thunder II - MP 24 - Thunder Damage
Lv 29 - Thunder Spark - MP 38 - Deal Thunder Damage In Radius
Lv 31 - Thunder Hand Drum - MP 52 - Mass Enthunder
Lv 42 - Thunder Armor - MP 91 - Mass Shock Spike
Lv 60 - Thunder IV - MP118 - Thunder Damage
Lv 70 - Choas Strike - MP164 - Physical Attack Effect: Stun
Leviathan
Skill : Tsunami
(Leviathan creates a massive tidal wave. The tidal wave crashes down on the target for powerful water-elemental damage.)
ABILITY LIST:
Lv 1 - Barracuda Dive - MP 8 - Physical Damage
Lv 10 - Water II - MP 24 - Water Damage
Lv 26 - Tail Whip - MP 49 - Effect: Gravity
Lv 33 - Slowga - MP 48 - Mass Slow
Lv 47 - Spring Water - MP 99 - Recover Party's HP and Status
Lv 60 - Water IV - MP118 - Water Damage
Lv 70 - Spinning Dive - MP164 - Physical Attack
Garuda
Skill :
Wind Storm (Garuda produces a ginormous tornado that engulfs the enemy doing massive
wind-elemental damage to the target.)
ABILITY LIST:
Lv 1 - Claw - MP 7 - Physical Damage
Lv 10 - Areo II - MP 24 - Wind Damage
Lv 25 - Vacuum Armor - MP 92 - Mass Blink
Lv 36 - Whispering Wind - MP119 - Recover Party's HP
Lv 48 - Hastega - MP112 - Mass Haste
Lv 60 - Areo IV - MP118 - Wind Damage
Lv 70 - Predator Claw - MP164 - Attack Three Times
Fenrir
Skill :
Howling Moon (Fenrir engulfs all the enemies in the radius in full Darkness.)
ABILITY LIST:
Lv 1 - Moonlit Charge - MP 17 - Effect: Darkness
Lv 11 - Crescent Fang - MP 19 - Effect: Paralyze
Lv 24 - Lunar Cry - MP 41 - Enemy ACC+Dodge Rate down
Lv 32 - Lunar Roar - MP 27 - Takes off two good status effects
Lv 43 - Ecliptic Growl - MP 46 - Mass STR,DEX,VIT+1, AGI,INT,MND,CHR+7
Lv 55 - Ecliptic Howl - MP 57 - Mass ACC+Dodge Rate up
Lv 65 - Eclipse Bite - MP109 - Attack three times
Source(s) : Gamefaqs and IGN faqs