In our last session, the Bard summoned her steed:
While mounted on it, you can make any spell you cast that targets only you also target the mount.
While wearing this hat, you can use an action to cast the disguise self spell from it at will.
targeting only herself and thus creating an independent cast of the spell on the mount. While the original spell has a duration of 1 Hour, since it was cast from the Hat it is also subject to
The spell ends if the hat is removed.
The spell on the Bard will certainly end if the hat is removed - but will the replicated and independent spell targeting the mount also end when the Hat is removed from the bard?