Players can pay the Blacksmith of Mammon Ancient Adena to imbue and A-grade weapon with a special ability , unseal A-grade armor, upgrade gear to better equipment, and exchange D or C-grade weapons (free of charge) for other weapons of the same value (crystal price).
Does anyone knows how much it costs put put acumen SA on a Sword of Miracles on the BS of mammon?
Don't be surprised that few know this info. Putting SA's on A grade weapons (not including Duals) is a major undertaking for most.
The Blacksmith of Mammon (catas) does indeed put the SA's on A grade Weapons. However, you will need to purchase A gemstones, from the Mammon Trader (necros). If I recall correctly you need about 140 A gemstones. They sell for around 30K AA. Depending on how much you pay for your AA, you're looking at just over 8M adena for the SOM SA, not including the blue 12 SA crystal (I pray you and/or your clan levelled it yourself and didn't buy one for 100 -150M adena.)