Does Weapon Master ignore Blade of the Ruined King's kill cost?

Ruling: Weapon Master does not ignore the kill cost of Blade of the Ruined King. The Weapon Master ability reduces the equip cost by power, but you must still pay the "kill a friendly unit" part of the equip cost.

Nuances:

• Only Quick-Draw circumvents the cost to equip entirely
• Weapon Master attaches for the equip cost reduced by power, but doesn't ignore non-power costs