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Bloonsday Device Pro is unlocked after using twenty Bloonsday Devices. This costs 5,000 in total (20 Bloonsday Devices). This Special Agent Pro leaves a trail of green plasma wherever the ray is moved. Plasma stays on the track until it dissipates or is spent on popping Bloons. The cooldown is still the same.
- The design resembles a Necron Monolith from Warhammer 40K.