Use Therions monsters to control the board, negate card effects, and go into xyz monsters! They are an archetype that revolves around special summoning themself from the hand by targeting another Therion monster in the gy and equipping that monster to themself for an attack boost. They are all level 7 or 8 monsters which allows them to go into xyz monsters easily. The Therions themself are nothing to sneeze at either though. King has a negate of any card or monster effect, Lily can search out a Therion spell/trap, bulls can destroy any one card on the field, leaper can bounce any of your opponent's cards, and duke stops your Therion monsters from being destroyed by card effects. All of these effects (except duke) have a cost that is actually beneficial for the archetype.
I am calling it now that this archetype will become meta when it comes to the TCG.