Mandras

Mandras move with a sinuous grace, but unlike skyeels (according to Shallan), they don't seem to really need to obey any rules of physics.
Their wings move in a regular rhythm, but said wings do not appear to be their source of either locomotion or lift.
==Appearance==
Long and sinuous, they have triangular heads and float on multiple sets of rippling wings.
They appear to come in a variety of sizes.
The arrowhead shape of the head of a mandras is exactly the same as that of the luckspren that can be found accompanying greatshells.
Shallan is sure it's no coincidence that the mandras are the same as those spren beside skyeels.
==Characteristics==
Mandras vanish sometimes. According to Shallan, their keepers call it "dropping." She thinks they must be getting pulled into the Physical Realm, and that this means one can never use only one mandra to pull a ship, no matter how small that ship. And, that one cannot take them - or most other spren - too far from human population centers in the Physical Realm because they waste away and die for reasons people there do not understand.
While she doesn't know just what they eat, Shallan says that Syl and Pattern have talked about the mandras feeding off emotions, but that there's something else.
==History==
While in Shadesmar, Kaladin observes a ship crashing through the ocean of beads there, surging toward the lighthouse. This ship employs no sail, no mast, and no oars. Instead, it's pulled from the front by an elaborate rigging attached to a group of incredible spren.
He sees that they pull the ship like chulls. Flying, majestic chulls with undulating bodies.
The process by which sailors steer, again according to Shallan, is incredible to watch. Each mandra is harnessed with a ring of pulleys on each side. To steer in the desired direction, the pulley's ropes are shortened on the corresponding side and then retired to the cleats on the ship's railing.
==References==
Category:Fauna of Roshar
Category:Spren
Category:Magical Creatures