Vampiric Touch
The touch of your shadow-wreathed hand can siphon life force from others to heal your wounds. Make a melee spell attack against one creature within reach. On a hit, the target takes 3d6 Necrotic damage, and you regain Hit Points equal to half the amount of Necrotic damage dealt.
Until the spell ends, you can make the attack again on each of your turns as a Magic action, targeting the same creature or a different one.
Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 3.
Vampiric Touch 5e 2024 vs. 2014 edition differences
The 2024 version specifies "up to 1 minute" duration, allowing for potential shorter durations, whereas the 2014 version states a fixed 1-minute duration. The 2024 version allows making the attack as a "Magic action" each turn, while the 2014 version states "as an action." The 2024 version clarifies targeting "one creature" and that you can target the same or different creatures, which is more explicit. The damage increase wording is slightly simplified but mechanically equivalent.