See Stormbourne Mystic.

Not sure why this is black. The only real precedent you have here is Indulgent Aristocrat, Urge to Feed and arguably Drana, Liberator of Malakir, which do flavorful things to buff up a certain tribe. Since you're using Storage counters and Gold tokens, maybe sacrificing one of those instead of tapping might make it a little more interesting? Something like:

", Sacrifice two artifacts named Gold: Put a +1/+1 counter on each Pirate you control."

Making it somewhat similar to Syndicate Trafficker.