A storm cloud hangs over your loop, striking the crowds nearby. Its kills are loop kills.
Recipe
Lightning Rod at its highest level + Kindling, then open a chest
Damage 130 · Count 2 · Area 32 · Duration 4 s · Hits every 0.33 s
Loop kills
A loop kill is a bug killed by a flare, by a loop-only weapon, by a flare charm or union just after a flare that catches a bug, or by anything within a few seconds of a flare catching it. Loop kills give far more XP and score than weapon kills, and bigger loops pay more.
Emberloop is a free bullet heaven game for your browser, on a phone or a computer.
FAQ
How do you get Thunderhead in Emberloop?
Take Lightning Rod to its highest level and own Kindling, then open a chest: it evolves into Thunderhead.