Monkey Knowledge
Extra Bounce
Extra Bounce in BTD6: +30 pierce for Glaive Ricochet and its upgrades (15 to 45 on Glaive Ricochet). One of the best Primary knowledge picks.
Increase Boomerang Ricochet to bounce up to 80 times.
Guide
Extra Bounce is a third-row Primary knowledge that adds +30 pierce to Boomerang Monkeys with Glaive Ricochet and its upgrades. A 3-0-0 Glaive Ricochet goes from 15 pierce to 45, and M.O.A.R Glaives from 60 to 90. You need 5 Knowledge Points in the Primary tree and Cheap 'Rangs. It costs one point and unlocks Recurring 'Rangs and Hard Press.
The current in-game text reads "Increases Boomerang Ricochet pierce by 30". Older versions described it as bouncing "up to 80 times", which no longer matches after Glaive Ricochet's pierce was rebalanced.
How it changes the game
Glaive Ricochet bounces from bloon to bloon until it runs out of pierce, so pierce is literally how many bloons each glaive can reach. Tripling it at tier 3 is huge:
- Mid game: a 3-0-x Glaive Ricochet clears dense groups of Rainbows and Ceramic children far more reliably. With the bonus it becomes a cost-effective early tower even in Half Cash.
- M.O.A.R Glaives (4-x-x): 90 pierce per glaive makes it one of the best mid-game cleanup towers for crowded rounds.
- Glaive Lord (5-x-x): both the thrown glaives (60 to 90) and the orbiting glaives (200 to 230) gain +30.
- Glaive Dominus: the Paragon's main attack still gets the bonus. Since version 57, its orbital glaives no longer do.
It does not affect Boomerang Monkeys below tier 3 on the top path, or the middle and bottom paths. It adds no damage, so Ceramics still take as many hits as before; you just reach more of them.
Is it worth it?
Priority: must-have for anyone who uses Boomerang Monkeys. It is one of the biggest single-node gameplay buffs in the Primary tree, especially in Races built around Glaive Ricochet and on round 63-style Ceramic rushes. It also sits on the route to Long Turbo, Bionic Augmentation and Mega Mauler.
Among third-row choices, take Extra Bounce early together with More Splatty Glue and 4 And 4. Players who never use Boomerang top path can delay it, but the route below it is still worth having.
Where it works
Extra Bounce is active wherever Monkey Knowledge is enabled, including Primary Only, Impoppable and Boss Events. It is disabled in CHIMPS. This is one of the knowledges that changes Boomerang strategies the most, so a Glaive Ricochet that solos a round with knowledge on can fail in CHIMPS. Test with knowledge toggled off.
Frequently asked questions
How much pierce does Glaive Ricochet have with Extra Bounce?
45 instead of 15. M.O.A.R Glaives goes from 60 to 90.
Does Extra Bounce affect Glaive Lord?
Yes. Its thrown glaives go from 60 to 90 pierce and its orbiting glaives from 200 to 230.
Does Extra Bounce affect Glaive Dominus?
Its main attack, yes. Its orbital glaives stopped getting the bonus in version 57.
Is Extra Bounce worth buying early?
Yes, especially if you play Races or like top-path Boomerang strategies.

