If you control more than one Amulet of Vigor, each Amulet’s ability triggers when a permanent enters the battlefield tapped and under your control. The first ability that resolves will untap that permanent. If the permanent somehow becomes tapped again before the next ability resolves, the next ability will untap it as well (and so on).
Une chambre de croissance de simic avec 2 amu en jeu rajoutera donc
Pour peu que tu contrôles une Azusa, Lost but Seeking tu pourras te l'autobouncer et donc rajouter .