By comparing the Xalea legend about the launching of Azys Lla and Dalamud to what we know of Allagan history, it seems as if Amon (or people working with him) were the ones one who used the crystal at the House of the Crooked Coin to pull it all off. Was the crystal at the House of the Crooked Coin something the Allagans created from scratch to specifically drain and store the aether of the Burn, or was it something that already existed that they found and were able to use for that purpose?