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Monkey Knowledge

There Can Be Only One

There Can Be Only One in BTD6 enables the Vengeful True Sun God. Exact requirements, cost, how the sacrifice works and the co-op and Sandbox limits.

There can be only one.

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More in Monkey Knowledge

Guide

There Can Be Only One is a fifth-row Magic knowledge that makes the Vengeful True Sun God possible. Its in-game description is just the title: "There can be only one." You need 8 Knowledge Points in the Magic tree, X-Ray Ultra and a one-time 500 Monkey Money. It has nothing below it. It was added in version 3, and since version 30 it requires X-Ray Ultra instead of Strike Down The False.

How it changes the game

Normally, upgrading a Sun Temple to the True Sun God (5-x-x Super Monkey) is the end of the top path. With this knowledge active, there is one more step:

  1. Build The Anti-Bloon (x-5-x) and Legend of the Night (x-x-5), the other two Super Monkey tier 5s.
  2. Fully power up a Sun Temple with the maximum sacrifices.
  3. Upgrade it to True Sun God while you own The Anti-Bloon and Legend of the Night, even if they are outside the sacrifice range.

The True Sun God then also sacrifices those two tier 5 Super Monkeys and becomes the Vengeful True Sun God. Its main attack is tripled and its supporting attacks are at least doubled, which makes it one of the strongest single towers in the game.

Rules to know:

  • You cannot buy The Anti-Bloon or Legend of the Night again while the Vengeful True Sun God exists, unless you sell it.
  • It does not work in Sandbox mode.
  • In Co-op, only one Vengeful True Sun God can exist per game.
  • Discount and sellback knowledges change how much cash you actually spent, which matters when you are hitting exact sacrifice thresholds.

Is it worth it?

Priority: situational. The Vengeful True Sun God costs an enormous amount of money: three tier 5 Super Monkeys plus a fully sacrificed Sun Temple. In normal games that end at round 100, you will rarely build it. For freeplay, Super Monkey challenges and showing off, it is the biggest power spike the Super Monkey has.

If you play late-game freeplay or enjoy Super Monkey strategies, get it once you have the Magic points. Otherwise, Mana Shield and Deadly Tranquility are more useful spends for the same row.

Where it works

There Can Be Only One works wherever Monkey Knowledge is enabled, except Sandbox. That includes freeplay, Magic Monkeys Only and Impoppable. It is disabled in CHIMPS and in challenges that switch knowledge off, so the Vengeful True Sun God cannot be made there.

Frequently asked questions

What does There Can Be Only One do?

It lets you create the Vengeful True Sun God by sacrificing The Anti-Bloon and Legend of the Night into a True Sun God.

How do you make a Vengeful True Sun God?

Own The Anti-Bloon and Legend of the Night, then upgrade a fully sacrificed Sun Temple to True Sun God with this knowledge active.

Does it work in Sandbox?

No.

Can you have two Vengeful True Sun Gods in co-op?

No. Only one can exist per co-op game.

How much does There Can Be Only One cost?

One Knowledge Point and a one-time 500 Monkey Money, with 8 Magic points and X-Ray Ultra.