Does pKreoss' Purification spell (which causes Upkeep Spells, Continuous Effects, and Animi to expire) remove Murder of Crows from the table? If so, at what distance? Does the cloud have to be entirely within range? Does the center of the cloud have to be in range? Does the edge of the cloud have to be in range? Or does the caster who is upkeeping the cloud have to be in range?
It would be removed if any part of the Murder of Crows AoE was within range of Purification. Like with a model, something is within if any part of it is within. If you used purification to take Arcane Shield off an Iron clad, you would only need to make sure the edge of the Ironclad's base was within the spell's effect. It would be the same with any other "thing" that was getting dispelled.