Dragon Souls are needed to activate Words as part of Shouts. They can only be obtained from slain dragons. But remember dragon souls can only be used to unlock words once you find them.
Tips For More Souls
Frequent dragon appearances = More Souls.
This works best at The College of Winterhold. Complete main quests up to Diplomatic Immunity, then go to The College of Winterhold and sleep more or less 36 hours. When you go outside there will be a dragon. Kill it and obtain its soul, then repeat sleeping process and once again when going outside there will be a dragon. Set game difficulty to novice to kill dragons easily and obtain dragon souls even easier.
advertisem*nt
