Once you have crafted or found an eligible heavy weapon, triggering its holy magic attack relies on the Spell Engine combat system rather than a standard vanilla melee swing.
Setting Up Your Controls
Because Divine Smite is cast through Spell Engine, you need to know which button activates spells in your setup.
1. Pause the game and open Options, then select Controls and Key Binds.
2. Scroll through the categories until you locate the Spell Engine controls.
3. Check which key or mouse button is assigned to your spell casting action, and rebind it if it conflicts with another mod's action.
Using Divine Smite in Fight
1. Place your greatsword, greathammer, or Watcher weapon onto your hotbar.
2. Select that hotbar slot so the heavy weapon is held in your main hand. Holding the weapon in your off-hand will not prepare it for main-hand casting.
3. Approach hostile monsters where the extra holy damage is most effective.
4. Press your assigned spell casting button while aiming at your target to trigger the Divine Smite ability alongside your regular heavy weapon combat.