Supreme Healing is a Cleric feature gained at level 17 in the 2024 SRD. When you would normally roll one or more dice to restore Hit Points to a creature with a spell or Channel Divinity, don't roll those dice for the healing; instead use the highest number possible for each die.
When you would normally roll one or more dice to restore Hit Points to a creature with a spell or Channel Divinity, don't roll those dice for the healing; instead use the highest number possible for each die. For example, instead of restoring 2d6 Hit Points to a creature with a spell, you restore 12.