Undying + Viper

Why this works

Laning together, Undying and Viper can apply consistent pressure through repeated slows and damage-over-time effects. Viper’s Poison Attack makes it difficult for an enemy to retreat, allowing Undying to land more Decays or let his Tombstone zombies catch up. This combination can grind down an opponent's health and resources. The main issue is that neither hero provides a hard stun to secure a kill. An opponent with an escape mechanism or who is quick with a teleport scroll can often survive, as the duo’s damage is gradual rather than a sudden burst.

The game's outcome often hinges on how well this pair can convert their early lane control into objectives. If they manage to get kills and take the tower, they can create a strong tempo advantage for their team. If the enemy lane plays safe and weathers the storm, the duo's impact can start to diminish. In later teamfights, their lack of lockdown becomes more pronounced against mobile cores, and their shared timing for peak effectiveness means they can fall behind if the game goes long without them having built a lead.