Riddles for Nazaam

I breath and things get hot,
though my heart is light as wind.
The swordsman knows me not,
though I helped to make his friend.
I cannot do my job alone,
Though others make me sigh,
By their strength my job is done,
So tell me, what am I?

Bellows

I'm not really more than holes tied to more holes; I'm strong as good steel, though not as stiff as a pole.

Chain

They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.

Grudge

They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.

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