Assailing adventurers with a mix of monsters is a tried and true tactic for making an encounter more exciting—but what if together they could do more? Enter Monster Combos and add creative ways to bring synergy to the creatures the GM takes to battle! Turn two elementals into one lethal amalgamation with Elemental Fusion, surprise the PCs with a shield guardian draped in the False Regalia of a rug of smothering, turn a whole flock of birds against a party duking it out with a harpy with Shrieking Song, and deviously work out how to include all 15 of these excellent combos into the next campaign! Dastardly designed by Andrew Engelbrite, illustrated by Rachel Maduro.