Answer:
They are the shore's gallant knights.
You can have it, and be at it, But it never lasts forever.
It is a popular afterlife destination where you want to send people when you're mad at them.
What is in seasons, seconds, centuries, and minutes, but not in decades, years, or days?
How many bricks does it take to complete a building made of brick?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.