One of the most common spiritual practices is smudging or the making of ritualized smoke. Smudging is a part of almost all traditional Northern Plains Indian Spiritual activities. The smoke of sage, tobacco, sweet-grass, and other plants is often used for purification. In some instances, the smoke from the burning plants, or mixture of plants, is pulled across the body in a cleansing action. The smoke is a purifying agent, a means of dispelling the everyday energy fields and substituting a pleasant odor for the spirits to work through.