Talk:Wisp in a Bottle

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Drop rate

Why is it that the first paragraph shows the drop rate as 0.25% / 0.375% whereas the "dropped by" box shows 0.25% / 0.5%? which one is correct? 00:39, 28 January 2021 (UTC)

Thanks for noting. The latter is correct as of Desktop version Desktop; I have fixed it in the article. --Rye Greenwood (talk) 01:29, 24 May 2023 (UTC)

wisp in a bottle

i cant get it i defeated 690 blue armored skeletons — Preceding unsigned comment added by at 07:06, 1 March 2021 (UTC)

"Invisible" dyes

Can anyone else confirm that this is currently the case? I couldn't find any changelogs mentioning the fact that they no longer (if they ever really did) turn the wisp invisible. Because while these do seem to be more transparent than they usually are, I definitely wouldn't call them "completely invisible" or whatever.

— Preceding unsigned comment added by BobTheSkrull (talk • contribs) at 21:40, 22 May 2023 (UTC)

Thanks, I added a {{verify}} tag. Looks like the tip was first added in 2015 and expanded over the years. --Rye Greenwood (talk) 01:29, 24 May 2023 (UTC)

Expert Mode?

THe article claims that expert mode doubles the drop rate to 0.5%; however, this would be 1/200, not 799/160000. Why is it so absurdly specific? Wasp [my nest] 10:44, 5 August 2023 (UTC)

I can't find where it is mentioned that the chance is doubled in Expert Mode, although it would still be very close, as 799/160000 is 0.4994%. Either way, this fraction comes from the way drop chances are implemented in Terraria's source code. In Expert Mode, the Wisp in a Bottle gets one reroll if the first roll fails. So there is one roll with a 1/400 chance, then in the case of failure there is another roll with a 1/400 chance. The important thing here is that the second roll only occurs if the first one fails (i.e. with a 399/400 chance). Combining the two:
  • First roll: 1/400 to succeed (1/400)
  • Second roll: first roll must fail (399/400), then 1/400 to succeed (399/400 * 1/400)
The final Expert chance is: 1/400   +   399/400 * 1/400   =   799/160000
--Rye Greenwood (talk) 22:37, 6 August 2023 (UTC)