# Twinned 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, such as [Charm Person](Mechanics/CLI/spells/charm-person-xphb.md), that can be cast with a higher-level spell slot to target an additional creature, you can spend 1 Sorcery Point to increase the spell's effective level by 1.