Sangraal

"A weapon capable of destroying Ascended beings."

- Daniel Jackson

The Sangraal is a device created by Merlin, and associated with the Holy Grail.

Histroy
Though it is unknown how it works, the Asgard have surmised its functions based on a datalog that was found in Merlin's vault on Avalon. According to Kvasir, the device releases energy in a manner similar to a Zero Point Module, but in reverse. The Sangraal would release energy into the dimension occupied by Ascended beings that would negate the powers of an ascended, whether Ancient or Ori. This energy is a form of interference, like two waves cancelling each other out, that would ultimately kill any ascended being.

Because the Others feared Merlin's research about a device that could be used against them, Morgan Le Fay was sent to destroy the device and kill Merlin. She managed to destroy the Sangraal, but believing the Ori were a true threat, preserved Merlin in a stasis pod and hid him on a planet whose Stargate address was composed of the addresses of three others: Castiana, Sahal, and Vagonbrei. After being awoken, Merlin used a molecular construction device to try and build another Sangraal, but his body had deteriorated too much while in stasis, so he downloaded his memories into Daniel Jackson's mind. He attempted to build another Sangraal, but was stopped by Adria, who captured Daniel.

She hoped to use Daniel to complete the Sangraal so that the Ori might destroy the Ancients without having to risk themselves, but Daniel, aided by Merlin's conciousness, used Adria to complete the Sangraal to use it against the Ori. Daniel, who was transformed into a Prior, used the Supergate and sent the Sangraal through it to the Ori home galaxy. However, it is still unknown if the Ori were destroyed, as another six Ori battlecruisers came through the Supergate. Adria later claimed that the Sangraal failed to kill the Ori, but Ba'al, having taken Adria as a host, claimed that the Ori were dead. Neither is particularly reliable, so the Sangraal's ultimate fate is unknown.