Most sphere slots on the Sphere Grid in Final Fantasy X are straightforward. Power spheres are for strength slots. Mana spheres are for magic slots. Speed spheres are for agility slots.
This is intuitive, because common spheres are dropped by common enemies. These spheres are in your inventory, so you know the correlation.
But with Luck, well…
That’s the problem. There’s nothing in your inventory to fill Luck spheres! So what are these spheres and how do we get them?
This article discusses how to add and fill Luck slots as well as how to get these rare spheres.
Also, if you love JRPGs like I do, you’re invited to join the Miranda Lemons stream on Twitch. Let’s talk and hang out sometime.
What Fortune Spheres Are
A Fortune Sphere is the name of the sphere that fills a Luck slot in your sphere grid.
Fortune spheres are extremely rare. It’s common to play through the entire game and not encounter a single fortune sphere. No wonder we have to look up what this sphere is called.
To get fortune spheres, you can find them in only four treasure chests throughout Spira. Only one fiend drops fortune spheres: Earth Eater, which you can unlock in the Monster Arena.
For step-by-step instructions to get fortune spheres, see “How to Get Fortune Spheres” below.
What Luck Spheres Are
A Luck Sphere creates a luck slot in the sphere grid from an empty node. After you create a luck slot, you can fill that slot with a fortune sphere.
By default, the sphere grid has few luck slots. These rare spheres are your only hope to improving your party’s luck stats.
It gets worse: If your goal is to max your character’s stats at 255, you need dozens of these spheres.
To get luck spheres, you can find them in treasure chests throughout Spira. Only one fiend drops luck spheres: Greater Sphere, which you can unlock in the Monster Arena.
For step-by-step instructions to get fortune spheres, see “How to Get Luck Spheres” below.
What the Luck Stat Does
Luck solely determines chance of critical hit. If you max your luck to 255, your character deals a critical hit 100% of the time.
Luck also boosts accuracy and evasion beyond the individual stats themselves. Extremely strong enemies can still be evasive, even when your party has maxed accuracy.
Luck is a powerful stat because its scope reaches farther than any other stat in the game.
Are Luck and Fortune Spheres Worth It?
Because Luck and Fortune stats must be mined from powerful monsters in the Monster Arena, there is no point to care about Luck and Fortune spheres until late game.
If your aim is to defeat the most powerful monsters in the game, fill all slots in the sphere grid, or max stats for your characters, then these spheres are a necessary evil to reaching your goals.
When in the Monster Arena, you will see the difference when you boost your luck.
How Many Luck and Fortune Spheres Are Needed to Max Stats?
The number of Luck Spheres you need to fill a sphere grid is about 58.
The number of Fortune Spheres you need to fill a sphere grid is about 64.
Each character starts at 17 Luck and each Luck sphere add +4 points. This adds up to 249 luck. The remainder points exist on the grid, mostly in +1 increments.
How to Get Fortune Spheres
You can get only four Fortune Spheres from chests. Otherwise, you can get fortune spheres as drops for defeating Earth Eater in the Monster Arena.
When you defeat Earth Eater, you either get Dark Matter or a Fortune Sphere. You get two items on an Overkill.
The treasure chest locations for Fortune Spheres:
Mi’ihen Highroad: Oldroad, South by Chocobo
Cavern of the Stolen Fayth: Between Calm Lands and Gagazet
Zanarkand Ruins: Overpass
Gagazet: Submerged Passage after the Second Trial of Gagazet
To unlock Earth Eater in the Monster Arena:
Unlock two Arena Monsters by capturing one of every monster in two of the following locations:
Mushroom Rock Road
Macalania Woods and Lake Macalania
Cavern of the Stolen Fayth
Find Earth Eater unlocked in the Original Monsters category of the monster arena.
To defeat Earth Eater:
Earth Eater has 1,300,000 HP and needs 99,999 to Overkill. Overkills are ideal so that you get two drops in one battle.
Earth Eater is a super boss, so you ideally already have powered Celestial Weapons — particularly Yuna’s celestial weapon — and got all of Yuna’s optional Aeons.
A simple strategy to defeat Earth Eater is to set Yuna’s Overdrive mode to ‘Avenger’, which fills Yuna’s Overdrive when party members are defeated, and give each party member armor with Auto-Phoenix. Each time Yuna’s Overdrive fills, unleash Anima’s Oblivion Overdrive, which can deal the over-99,999 damage necessary to achieve an Overkill.
How to Get Luck Spheres
You can find Luck Spheres in treasure chests across Spira. Otherwise, you can get luck spheres as drops for defeating Greater Sphere in the Monster Arena.
When you defeat Greater Sphere, you either get Dark Matter or a Luck Sphere. You get two items on an Overkill.
To unlock Greater Sphere in the Monster Arena:
Unlock two Species Conquest Monsters by capturing each monster in two of the following types:
3 of the ‘Wolf’-type fiends
3 of the ‘Reptile’-type fiends
5 of the ‘Bird’-type fiends
4 of the ‘Wasp’-type fiends
4 of the elemental ‘Imp’-type fiends
4 of the ‘Eye’-type fiends
3 of the ‘Flan’-type fiends
3 of the ‘Element’-type fiends
3 of the ‘Helm (armored)’-type fiends
4 of the ‘Drake’-type fiends
5 of the ‘Fungus’-type fiends
5 of the ‘Bomb’-type fiends
5 of the ‘Ruminant’-type fiends
10 of the ‘Iron Giant’-type fiends
Find Greater Sphere unlocked in the Original Monsters category of the monster arena.
To defeat Greater Sphere:
Greater Sphere has 1,500,000 HP and needs 99,999 to Overkill. Overkills are ideal so that you get two drops in one battle.
To defeat Greater Sphere, focus on building your party’s Magic Defense, since high Magic Defense is essential to withstand attacks.
The same strategy works as for Earth Eater:
Set Yuna’s Overdrive mode to ‘Avenger’, which fills Yuna’s Overdrive when party members are defeated, and give each party member armor with Auto-Phoenix. Each time Yuna’s Overdrive fills, unleash Anima’s Oblivion Overdrive, which can deal the over-99,999 damage necessary to achieve an Overkill.
Tidus’ Slice & Dice Overdrive as well as Wakka’s Attack Reel Overdrive are valuable Overdrives in this battle.
These spheres are hard to collect and may be your first introduction to just how crazy Final Fantasy X is in introducing near-impossible challenges with hundreds more hours of playtime.
If you enjoy Final Fantasy and have more questions or just want to chat about the game, catch me on my Twitch channel. I stream there Wednesday, Friday, and Sunday evenings on the US Pacific Coast.