| Wonderstell |
You carry a non-masterwork simple or martial weapon that has been passed down from generation to generation in your family.
Benefit: When you select this trait, choose one of the following benefits:
proficiency with that specific weapon
a +1 trait bonus on attacks of opportunity with that specific weapon
a +2 trait bonus on one kind of combat maneuver when using that specific weapon.
Note: You pay the standard gp cost for the weapon.
At 1st level, a battle host forms a supernatural bond with a specific weapon,
suit of armor, or shield. This selection is permanent and can
never be changed. The bonded item is masterwork
quality and the battle host begins play with it at no cost.
Relevant abilities for the question at hand.
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The "fluff" as you call it are the restrictions placed on what weapons can be chosen for the trait. The "fluff" is RAW.
You could probably convince a GM for a homebrew, but these two abilities wouldn't work together according to RAW.