The likely answer is that “the sword in the stone” in Garden Tower Defence is a clue/quest object, not a normal item you can just click-pull anywhere. A recent Garden Tower Defence clue video exists, but I couldn’t verify the exact in-game steps from the available results, so I don’t want to guess and mislead you.

What to try

  • Finish the related clue or quest first, because these Roblox-style hidden objects are usually locked behind progression.
  • Re-check the area the clue points to and interact with the stone from different angles.
  • Look for a nearby NPC, trigger, or item requirement that activates the sword.
  • If the game has a quest log or clue list, make sure the “first clue” or sword-related objective is actually active.

Why this may be confusing

Garden Tower Defence has community guides and videos for secret objectives and beginner progression, which suggests the sword may be tied to a specific hidden step rather than a free-roam action. The search results did not provide a reliable written walkthrough for this exact sword step, so the safest advice is to follow the in-game clue chain rather than brute-force the stone.

Best next step

Open the clue-related part of the game and check whether the sword unlock requires a prior task. If you want, I can help you turn this into a clean step-by-step walkthrough once you share the exact clue text or a screenshot.