Be a Ninja

"Brush up on ninja skills and attack faster. More effective when used by an actual ninja."

- BATTD description

Be a Ninja is a Common trinket in Bloons Adventure Time TD. It has no character restrictions, letting any character equip it.

Description
Be a Ninja is a large, orange hardcover book with an illustration of a stereotypical ninja on the front cover, covered in black clothing and having an opening for their face. On top the ninja and above is red text iterating the book's title "Be a Ninja".

Strategy
As a common stat boosting trinket, Be a Ninja is probably one of the least useful for almost every character it can be equipped to given the options more obscure rarities can provide and even the items in the common rarity that can give Be a Ninja a run for its trinket slot. Lumpin Delicious Sandwiches for example provides double the speed bonus at the same rarity, while the Power Ring of Speed grants fivefold the benefit for only being a single rarity level higher.

The best usage for Be a Ninja is in combination with the Character it obviously synergises with, Sai the Shadow. With her, Be a Ninja grants her a 3% overall speed boost, making it a better choice than the Lumpin Delicious Sandwiches in this situation though still outclassed by the Power Ring of Speed and various other trinkets.

Of course, like most other trinkets of this kind, use on tandem with other speed boosting trinkets is where it serves the best, as it allows Sai to have just that little extra increase of speed the player could need out of her. On other characters however, it is advised only to use Be a Ninja if there is literally no other trinket that can be fitted into the open slot, as the 1% increase in attack speed is virtually insignificant on its own, but is better than not having it at all.

Same strategy applies for Ice Cream Sundae, as they both give +1% speed, but with the 3% speed boost for Jake instead.

Trivia

 * Be A Ninja is a ninja manual, a book in the episode "The Chamber of Frozen Blades" from the Adventure Time series.
 * The book has appeared in other places within BATTD, being held by Finn in the Adventure opener for Frozen Blades, as well as being found inside one of its maps, Chamber of the Frozen Blades.