Hi, I'm trying to make system with rarity and try to make a upgrade to make something less rare. Can anyone help?

i assume this is what you want?

<(pick random (0.0) to (1.0)) < (chance)>

in this case chance should be 1.0 for 100% chance and 0.0 for 0% chance
the pick random block values can be adjusted if you want a different range for the chance variable
(note: the decimals on the pick random block are intentional, they allow decimal values to be chosen)

when I start as a clone
delete this clone

You can do this:

when I receive [something v]
set [rarity v] to (pick random (1) to (100)
if <<(rarity) < (highestchance)> and <(rarity) > (smallestchance)>> then
...
end


// upgrade sprite

when this sprite clicked
if <(coins) > (cost)> then
change [smallestchance v] by (-5)

else
broadcast [broke v]
end

Try this. It may work.

Note: the pick random reporter block only picks integers.

define Protect Sig
point towards [(❁´◡`❁) (kumquats) v]
create clone of [( •̀ ω •́ )✧ (Soldiers) v]
broadcast [chargeee!!!! v]

when I receive [chargeee!!!! v]
go to [(❁´◡`❁) (kumquats) v]
stop [(❁´◡`❁) (kumquats) v] // "my duty is now over"