Every few seconds casts an explosive fireball spell.
~ BTD6 Description
Fireball is the first upgrade of Path 2 for the Wizard Monkey in BTD6, making a reappearance in this game. As before, this attack creates a small explosion, popping up to 18 bloons caught in it. The fireball explosion cannot pop Black or Zebra Bloons, though the explosion can pop any other type. However, fireball explosions cannot become released if they contact Purple Bloons, as Purple Bloons will simply absorb whole fireballs unharmed.
Fireball allows the Wizard Monkey to gain a cheap way to pop Lead, as well as slightly increases the Wizard Monkey's potential for grouped popping power. It is not very reliable, but it is helpful as cheap popping power versus Camo Leads when paired with Monkey Sense.
The blast radius for Fireball is quite small, at 10 blast radius. As such, treat this attack like a slow-shooting unupgraded Bomb Shooter.
In BTD6, this upgrade can pop Purples if the original projectile hits a non-Purple bloon and triggers an explosion. This is due to the original fireball being fire damage type but the explosion created being explosion damage type. This was used in Wizards Only CHIMPS.