I'm not sure if this has been suggested in the past but an idea popped into my head and I thought how cool would a Titan look with a shoulder mounted mark instead of around the waste, or this should be an option, I think it would look nice on a Titan and give them a more 'veteran' look, hope you one day bring this into destiny!
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I thought it would be cool to give warlocks books that they strayed to their waste I thought it'd fit more the paradigm of knowledge than the odd bicep bond