Slave Slave Gold Statue
Trial requirement Slave evolved to 5 stars and equipped with a certificate.
Trial reward

3 Slave Pearls, 5 Gem, 100000 Coins

Pearl Cost

10x Slave Pearl
1x Spartan Pearl

Statue Cost

80 Magic Iron
3x Dionie (Lv.150)
2x Theia (Lv.240)
2x Phoebe (Lv.360)

Statue Bonus Attack+3, Power+3

In Sky and Space, Fire+5
Lower Clone Capacity+6

if method above does not work due to not having enough EP (short on upgrading for the second Elf's Arrows), the method below may work.  This did take two attempts to succeed (there is not a lot of room for error).

Completed with gumballs:

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