The following features can make a combat encounter more interesting or challenging: Changes in Elevation. Terrain features that provide a change of elevation (such as stacks of empty crates, ledges, and balconies) reward clever positioning and encourage characters to jump, climb, fly, or teleport. Defensive Positions. Enemies in hard-to-reach locations or defensive positions force characters who normally attack at range to move around. Mixed Monster Groups. When different types of monsters work together, they can combine their abilities—just like characters with different classes and origins. A diverse force is more powerful. Reasons to Move. Use features that encourage characters and their enemies to move around, such as chandeliers, kegs of gunpowder or oil, and rolling stone traps.