Complex sentence: The device provided the requisite amount of power for the Stargate to create a wormhole to another galaxy by depleting the liquid Naqahdah energy cell of a staff weapon, which allowed O'Neill to travel to an Asgard-controlled location in the Ida galaxy.
Split into simpler sentences: The device provided the requisite amount of power for the Stargate to create a wormhole to another galaxy, by depleting the liquid Naqahdah energy cell of a staff weapon. Allowing O'Neill to travel to an Asgard-controlled location in the Ida galaxy.