Okay so I bought a spare Cragward Custodian because I have two icey looking dragons

and I went to try and put it on one of my dragons but it wouldn't let me?
Is this because I already have a dragon with it as it's familiar?
and does this also mean that if we have a double of a familiar we can't use it?

and I went to try and put it on one of my dragons but it wouldn't let me?
Is this because I already have a dragon with it as it's familiar?
and does this also mean that if we have a double of a familiar we can't use it?











