# Extended Spell *Source: Player's Handbook (2024) p. 142. Available in the <span title='Systems Reference Document (5.2)'>SRD</span>* When you cast a spell that has a duration of 1 minute or longer, you can spend 1 Sorcery Point to double its duration to a maximum duration of 24 hours. If the affected spell requires [Concentration](Mechanics/CLI/rules/conditions.md#Concentration), you have [Advantage](Mechanics/CLI/rules/variant-rules/advantage-xphb.md) on any saving throw you make to maintain that [Concentration](Mechanics/CLI/rules/conditions.md#Concentration).