What legendary Pokémon is you key

Gemini: Latias

Cancer: Palkia

Sagittarius: Suicune

Aries: Giratina

Virgo: Entei

Leo: Ho-oh

Aquarius: Genesact

Libra: Zygarde

Pieces: Reshiram

Capricorn: Azelf

Taurus: Keldeo

Scorpio: Mewtwo