Multi Shot

 allows the Spike-o-pult in Bloons TD 3 to throw a bigger projectile. This upgrade is last upgrade on the second path for the Spike-O-Pult. It costs $490 on Easy, $585 on Medium, and $620 on Hard.

Multi Shot is very powerful if purchased on earlier rounds, but it is less effective against ceramic bloons and MOABs.

Even though it looks like three spiked balls, it throws just one, but bigger projectile, so that it can only do one layer.

Trivia

 * The Multi Shot tower is not controlled by a visible monkey, unlike earlier Spike-o-pult upgrade.