All the while being a massive 6/6 with vigilance
Even though legendary creatures can untap the Dowser, this seems a bit inefficient
The effect triggers whenever Fairy Godmother, Mystic Armorer quests, granting all of your characters Challenger +3 - boosting their strength by three when they challenge an opponents character - and giving them the ability to return to your hand when banished in a challenge
The process repeats for the second and third packs, with the direction of the passing changing to the right for the second pack and then back to the left for the third pack
You can create powerful chains with him, wherein you play an aura on Chishiro, thus creating a token, then play an aura on the token, creating another, and so on