Bam's Chilling Domain

You summon a swirling cylinder of cold energy with a radius of 30 ft. and a height of 50 ft. 

Any chosen ally within the cylinder will receive +1 bonus AC as the cold energy attempts to dissuade incoming attacks,
ally weapons are also imbued with cold energy granting an extra 1d8 cold damage on melee hit, 2d8 on a critical.