Chaos Knight + Undying

Why this works

Running at enemies in the laning stage becomes very effective with this pair. Undying's Decay softens a target up by stealing strength, making them an easier kill for a physical damage dealer like Chaos Knight. A well-placed Tombstone then creates enormous pressure, spawning zombies that slow and swarm the already-weakened hero. This gives Chaos Knight an easy opening to Reality Rift in and secure the kill with a Chaos Bolt. The chaos of the zombies also provides good cover for CK's Phantasm illusions, making it harder for opponents to identify and focus the real hero.

This duo looks to build an early lead and convert it into mid-game objectives. They want to group up and force fights around Tombstone, allowing Chaos Knight to pick off key targets while the enemy team is distracted. However, the strategy relies heavily on this timing. If the enemy can survive the initial onslaught and farm items that clear zombies quickly, the pressure drops off. Late-game carries and heroes with heavy area-of-effect damage can stall until both Chaos Knight and Undying are past their strongest points, often leveling the playing field.