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Ability duration is longer, and MOAB-Class Bloons spawn with less health during the sabotage.
~ In-game description

Grand Saboteur is the final upgrade of Path 2 for the Ninja Monkey in Bloons TD 6. It improves its own Bloon Sabotage ability into the Grand Saboteur ability, which slows down all MOAB-class bloons for 30 seconds instead of 15 seconds, and additionally causes all incoming MOAB-Class Bloons to spawn with only 75% of their original health before entering the track, along with the usual 50% slowdown to all bloons on screen. Both the duration for percentage damage to incoming MOAB-class Bloons and the extended Bloon Sabotage slowdown lasts for 30 seconds instead of 15 while maintaining a cooldown of 60 seconds. Additionally, ability grants all Shinobis on screen +5 range and +1 damage to MOAB-class bloons.

It costs $18,700 on Easy, $22,000 on Medium, $23,760 on Hard, and $26,400 on Impoppable.






Targeting Priorities[]

Grand Saboteur targets bloons using the standard targeting priorities. Its main attack shoots straight movement projectiles.

  • First: Targets the first bloon visible within its range.
  • Last: Targets the last bloon visible within its range.
  • Close: Targets the closest bloon visible within its range.
  • Strong: Targets the strongest bloon visible within its range.

Grand Saboteur's ability consists of two different offensive attacks: global slowdown, and instant percentage damage. The ability slowdown targets Whole Screen, while the instant percentage damage is a pre-emptive targeting. Grand Saboteur ability also has a charge tower buff that targets all Shinobis and above.

Grand Saboteur can access Camo Prioritization, allowing all its attacks to prioritize Camo Bloons over other types when this secondary targeting option is active.



Grand Saboteur further improves the Bloon Sabotage ability to last twice as long and inflict instant 25% damage to all incoming blimps on screen. Although considerably more expensive than multiple Bloon Sabotage abilities, the instant percentage damage and increased duration can come in handy in specific scenarios. Outside of certain challenges, it is mostly used in super high late-game runs to deal massive damage to incoming BADs. However, Grand Saboteur's Shinobi buff via its ability can be used to empower Shinobi armies.


  • The Grand Saboteur is very useful on Rounds 80+ because MOAB-class health scales from that point due to Freeplay Rules, for modes including Impoppable and CHIMPS, which both require Round 100 to be beaten.
  • The extended slowdown along with the weakening of all new MOAB-Class Bloons makes it very powerful against MOAB-Class Bloon rushes and especially against D.D.Ts.
  • It is possible to damage a BAD immediately before it appears by activating the Grand Saboteur ability right before Round 99 ends.
  • This, combined with Ground Zero or Tsar Bomba, can deal with Round 95 if the track is long enough. This is a recommended strategy for CHIMPS.
  • The blimp health reduced from this tower's ability will add to the damage count of the tower. For example, the B.A.D. at Round 100 has 28,000 health, and when the ability is used at the end of Round 99, the B.A.D. will spawn with 21,000 HP, and the lost 7,000 HP will be added into this tower's damage count.

Version History[]

Until Version 31.0, Grand Saboteur received several quality-of-life fixes to make Grand Saboteur work more like it is intended to be. Version 31.0 gave Grand Saboteur its first real balance change by letting its ability buff Shinobis, which buffs it in normal gameplay but can be seen as a nerf only in Gravelord Lych boss battles.

  • Buff Grand Saboteur now slows down all bloons on screen as well.
  • Buff Grand Saboteur effects now can carry over rounds.
  • [Undocumented] Bloon Sabotage's ability damage to MOAB-class Bloons will be shown on the damage count.
As ninja is the 'Camo Specialist' and has been since inception, it is the only tower that will unlock Camo Prioritization on the base tower. [...]
~ Ninja Kiwi
  • Buff Affected by Distraction alternate attacks buff
Grand Sabotage is extremely powerful in freeplay, but really boring outside of that one scaling mechanic. For a little more flavour with the shinobi mechanic, the T5 will now boost the potential of your shinobi army.
~ Ninja Kiwi
  • Buff Grand Sabotage ability grants all Shinobis on screen +5 range
  • Buff Grand Sabotage ability grants all Shinobis +1 damage to MOABs


When activating Grand Saboteur Ability:


Official artwork[]


  • Before Version 1.7, the Grand Saboteur ability did not slow down bloons. This is now fixed and now it works as intended.
  • Grand Saboteur in Bloons TD 6 is the cheapest Tier 5 Ninja Monkey upgrade for the upgrade alone throughout all versions of the BTD6 Generation.