Reaper

Overview
The Reaper is a powerful Undead hero. It uses its giant scythe to deal high damage from behind tankier units. Every time the Reaper kills an enemy, it summons a Zombie to aid in the fight.

Special Ability
The Reaper's special ability is Soulcaller. With this ability unlocked, the Reaper has a chance to harvest a more powerful soul, and summon something more powerful than a Zombie (Golem or Banshee).

This ability unlocks at two stars. It has a 15% chance of happening each time the Reaper kills an enemy. At three stars, it becomes a 25% chance of happening. At four stars, it becomes a 35% chance. At five stars, it becomes a 45% chance.

Strategy
The Reaper is not a tank! While it has a lot of health, it will quickly be killed by enemies. Use the Reaper's range to your advantage and position him behind tough units.

The Reaper does not do area damage. Many units will overwhelm the Reaper and kill him.

The Reaper cannot summon zombies from killing the Necro's Piranha Skeletons. Necros could be a good choice to use against the Reaper, because many units will overwhelm the Reaper.