Heracles Slay the Nemean Lion. 2. Slay the nine-headed Lernaean Hydra. 3. Capture the Golden Hind of Artemis. 4. Capture the Erymanthian Boar. 5. Clean the Augean stables in a single day. 6. Slay the Stymphalian Birds. 7. Capture the Cretan Bull. 8. Steal the Mares of Diomedes. 9. Obtain the girdle of Hippolyta, Queen of the Amazons. 10. Obtain the cattle of the monster Geryon. 11. Steal the apples of the Hesperides (he had the help of Atlas to pick them after Hercules had slain Ladon). 12. Capture and bring back Cerberus. After completing these tasks, Heracles joined the Argonauts
Arion (mythology) (Gaia): According to Pausanias, Heracles, waging war with the Eleans, acquired this horse from Oncus. The son of Zeus would have thus ridden upon Arion when he seized Elis. Thereafter, Heracles gave Arion to Adrastus; this is why Antimachus said of Arion: "Adrastus was the third lord who tamed him.". Arion (mythology) In Greek mythology, Arion or Areion (, gen.: Ἀρίωνος, Ἀρείωνος) is a divinely-bred, extremely swift immortal horse which, according to the Latin poet Sextus Propertius, was endowed with speech. Arion's siring by Poseidon in stallion form vary by author: according to the Pseudo-Apollodorus, the horse was foaled by