Vivi is the only character that will be able to use Black Magic abilities through the entire course of the game. Black Magic causes large amounts of damage to a target according to the element. You'll want to attack the enemy with the element which is opposite to their base attribute. For example, if an enemy is ice, you'll want to attack them with fire and so on.
Vivi does have one of the most powerful attacks in the game, that being "Doomsday." However, when using this spell it will cause damage to everyone on the battle screen. Yes, even the members of your very own party! When using this spell you'll want to make sure that all your characters have some sort of armor that will absorb or nullify the effects of Shadow elemental damage so you'll be able to use the spell without the large price of cutting your character's HP drastically.
Ability
Effect
MP
Fire
Small Fire Damage to target(s)
6
Fira
Medium Fire Damage to target(s)
12
Firaga
Large Fire Damage to target(s)
24
Sleep
Causes Sleep Status
10
Blizzard
Small Ice Damage to target(s)
6
Blizzara
Medium Ice Damage to target(s)
12
Blizzaga
Large Ice Damage to target(s)
24
Slow
Slows the ATB Guage
6
Thunder
Small Thunder Damage to target(s)
6
Thundara
Medium Thunder Damage to target(s)
12
Thundaga
Large Thunder Damage to target(s)
24
Stop
Haults all actions
8
Poison
Gradually reduces HP over time
8
Bio
Poisons and causes non-elemental damage
18
Osmose
Absorb MP from target
2
Drain
Absorb HP from target
14
Demi
Lowers HP by a certain percentage
18
Comet
Non-Elemental Damage
16
Death
Instantly KO a target
20
Break
Petrifies a target
18
Water
Causes Water Damage to target(s)
22
Meteor
Non-Elemental damage to all enemies
42
Flare
Non-Elemental Damage
40
Doomsday
Causes massive amounts of Shadow Damage to all on screen