Duo boons
Duo boons appear only when you hold specific boons from two gods. These pages list exact prerequisites.
Master Conductor
When your bolts hit an enemy suffering from Slip, they arc to nearby enemies three times for 150% chain lightning damage.
Scalding Water
Poseidon's waves vaporise when they strike a burning enemy, causing a supercritical steam blast that consumes every Scorch stack for instant burst damage.
Natural Selection
Every boon and tablet you find for the rest of the run has a greatly increased chance to appear as Rare or Epic.
King's Ransom
Converts every Hera boon level you own into Zeus levels and immediately doubles the level of all your Zeus boons.
Plan it with a tool
Duo Boon Finder — Prerequisite Checker
Select the gods in your run and see which of the 4 Hades 2 Duo Boons you can trigger, which prerequisite boons you still need, and the aspects that use them.
Build Planner — Weapon, Aspect, Boons & Arcana
Assemble a full Hades 2 loadout: pick 1 of 6 Nocturnal Arms and 1 of 18 Aspects, layer boons, set a Keepsake route and attach an Arcana loadout.