Magic Lamp
April 4, 2017
15:24
The Magic Lamp is a very special item found in the Istory Falls, specifically "behind" them, at the end of the dungeon.  This item can be used by any character.  When you use the Magic Lamp, it casts a Summon spell, for free, and can essentially be used infinitely.
The summon it calls isn't random.  It performs summons in this order: 
Bahamut -> Leviathan -> Odin* -> Syldra -> Carbuncle -> Catoblepas* -> Golem ->Titan -> Ifrit -> Ramuh -> Shiva -> Remora -> Sylph -> Chocobo (Normal)*
The Magic Lamp remembers which summon it is on between battles.  This means that, essentially, the more you use it the weaker it gets.  If you continue to use it too much when it's just summoning Chocobo, it turns into the unique Egg Chop spell instead - which... doesn't do anything at all.
There's three special things to note about the Magic Lamp.
First, it doesn't summon Phoenix.  It skips it entirely.
Secondly, it CAN be reset.  There are two locations you can reset it - either at the top of Istory Falls where you got it (You have to enter it from 'above' the falls on Boko), or a location in the Great Trench.  Resetting the Magic Lamp sets it back at Bahamut in its progression.
Third, certain summons are treated specially:
Chocobo: On SNES/GBA, Normal chocobo is summoned.  On iOS, Fat Chocobo is summoned.
Catoblepas: On SNES/GBA, Catoblepas targets one random foe.  On iOS, Catoblepas attempts to petrify EVERY enemy.
Odin: Regardless of version, Odin always attempts to perform Zantetsuken.  This will still FAIL on any Heavy target present in the battle, but WILL succeed on non-Heavy targets!
Knowing about the Magic Lamp and how it works can add some much needed magic power to endgame parties.