Roshan or the Immortal Roshan is the strongest neutral monster in Dota 2. Roshan easily defeats most heroes one-by-one. Players usually wait until the late phase of the game, when the farm heroes collect their best items or try to kill him with the whole team. You bet on a team or team member who will kill Roshan and earn cash if the bid is winning.If dota2 betting sites you bet on first blood, you bet on a team that kills the first hero compared to the opponent team. If you bet on team B, your bet is multiplied by the odds displayed in the box under the team you’ve chosen.