Naga Siren + Shadow Fiend

Why this works

Picking these two heroes together is a bet on landing one specific ultimate combination. Naga Siren's Song of the Siren can set up stationary targets for a full-duration Requiem of Souls from Shadow Fiend. The main issue is that both heroes are incredibly greedy and need a lot of farm to be effective. They often want the same safe jungle camps and lane creeps to hit their item timings. Naga Siren is built to farm the whole map with her illusions, which can easily starve a core like Shadow Fiend who also needs to secure his own items to have an impact.

This shared need for resources can put your team on the back foot from the start. Your game plan becomes about stalling and farming until you can execute the Song and Requiem combo. Opponents can exploit this by pressuring lanes early, knowing your lineup is weak before those key ultimates are online. If that big combo is avoided with good positioning or buybacks, the whole strategy can fall apart, since so much of the draft's power is concentrated in that single, high-stakes moment.