Fast Channel
Level 14 Cleric

Prerequisites: harmful font or healing font

Divine power is always at your fingertips, swiftly responding to your call. When you cast harm or heal by spending 2 actions, you can get the effects of the 3-action version instead of the 2-action version.
You can do this with harm if you have harmful font or heal if you have healing font (or both if you have Versatile Font).