Spike Factory (BTD7:GW)

Overview
Spike Factory Produces spikes every 2 seconds and spikes disappear after 1 round or 70 seconds.

Path 1
Bigger Stacks

Deadly Hot Spikes

Spiked Balls

Spiked Mines

Super Mines

Path 2
Faster Production

Even Faster Production

Mass Production

Spike Storm

Carpet of Spikes

Path 3
Long Reach

Directed Spikes

Long-Life Spikes

MOAB-SHREDER Spikes

Extendo-SHREDER Spikes