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Put the "Ghost" on your horse for 550 passes. 

.

Also I have these items for selling:

Water of Youth
x 5

Piece of Cloud
x 2

Morpheus' Arms
x 1

Optimization

Philotes' Stroke
x 13

Achilles' Heel
x 8

Philosopher's Stone
x 5

Black Orchid
x 5

Kairos Dial
x 4

Chronos' Timer
x 2

Pandora's Box
x 1

Athena's Medal
x 1

Reproduction

Artemis' Arrow
x 13

Aphrodite's Tears
x 11

Fertility Wand
x 4

Phanes egg
x 4

Hera's Pack
x 4

Hera's Lily
x 2

Eros egg
x 1

Zeus' Lightning Bolt
x 1

Customization

Medusa's Blood
x 13

Ow's Helios' Ray
x 7

Golden Apple
x 6

Vintage Apple
x 5

Braided horsetail
x 3

Custom clip
x 3

Harmony Pack
x 3

Iris' Coat
x 2

Hiking Journal
x 2

Button plaiting
x 2

Parade Apple
x 1

Water element
x 1

Air element
x 1

Helios' Ray
x 1

Historical Wanderer's Spirit
x 1

Iron Mask coat
x 1

Bonus

 Croesus' Fortune
x 5

Bonus Pack
x 4

Elves Pack
x 2

Companions

Rabbit
x 3

Owl
x 2
Hedgehog
x 2

Tsuru
x 2

Llama
x 1

Shiba Inu
x 1

Panda
x 1

Penguin
x 1

Snow monkey
x 1

Krill
x 1

Kitsune
x 1

Ostrich
x 1

Seahorse
x 1

Ryū
x 1

Hen
x 1

Grizzly
x 1

Clownfish
x 1

Ghost
x 1

Crab
x 1

Cat
x 1

Macaw
x 1

Cowfish
x 1

Phoenix
x 1

Mapache
x 1

Surgeonfish
x 1

Pallas's cat cat-sith
x 1

Lionfish
x 1

Sea turtle
x 1

Bear
x 1