The Sanguinesti Staff is a magic weapon requiring 75 Magic to wield, it is only available as a rare drop from the Theatre of Blood.
The staff has a built-in magic spell that can be used regardless of the spellbook the player is using, but the staff will need to be charged. 1 Gold DSCoins (1m) will grant the staff 5,000 charges.
In addition, the Sanguinesti staff offers a 8x8 AOE attack, 10% Drop Rate, 10% Double Drop Rate, and 10% luck bonus.
At the moment, the price of the Sanguinesti Staff is roughly: 20B+ DScoins