Reaper by thedisputednewt

Instead of mana a reaper has fuel. It caps out at 100. When respawning you start with max fuel. Gain 30 fuel from healing wells, and 5 per second in the altar. Gain 60 when you hearth. Activate this trait and spend 10 fuel to jump up to a short distance.

The reaper unloads his guns dealing 100 damage (+4% per level) per second to the closest target. Prioritized heroes. Switches targets if the first one dies. Lasts 3 seconds.

Cost: free
Cooldown: 6 seconds. Doesn't start until the attack finishes.

The reaper spins and fires his jet pack, dealing 40 damage (+4% per level) and leaving a circle of fire for 3 seconds dealing 25 damage (+4% per level) per second to enemies inside.

Cost: 25 fuel
Cooldown: 4 seconds

The reaper gains 1 stack for every minion kill, 5 for structures and Mercs, and 10 for heroes. Max 100 stacks. The reaper gains fuel equal to the number of stacks over 5 seconds. You cannot move or attack during his time. Getting hit while synthesizing causes you to lose all stacks gained so far.

Cooldown: 15 seconds

Increase basic attack damage by 25%, and double Cooldown regen. Lasts 8 seconds.

Cost: 40 fuel

Throw a KD8 Charge, which explodes after 2 seconds dealing 150 damage (+4% per level) and Knocking targets back and stunning for 1 second.

Cost: free
Cooldown: 90 seconds