The ship encounters a massive school of fish - so many cod that the progress of the ship is impeded. Using nets, baskets or other devices, the ship can load up on as much fish as it cares to carry. Go to Comment
The old Matriarch in charge of the herd may be able to draw upon magics to help find water, navigate generally and to perhaps communicate over distances their already awesome abilites do not allow. The Elephant's graveyard may be a place the Matriarch would go to to commune with their ancestors.
Magics to help calm males in frenzy would be useful also and to counter that of any predator creatures. Perhaps they can sustain longer migrations then one would believe partly though the intercession of magic. Go to Comment
I think that any mage could build them with a bit of work, but for most they would consider it a dangerous precendent - they would be diminishing their own power and prestige. I would, however, not allow easy mass production of said items. All items are costly or else world balance will be changed.
Give the masses magic, and things will change. People in power hate change. Go to Comment