Roblox Script Generated by ScripterAI

"make me a spell that fireball someone and it take 10 damage every 10 seconds and you can press E to make the spell start use instructions on how to use this script"

This script will create a tool that, when equipped and the "E" key is pressed, will apply a "fireball" effect to the nearest player within a 10-stud radius. The affected player will take 10 damage every 10 seconds.

This script should be placed in a LocalScript within a Tool object. The Tool should be placed in the StarterPack for players to pick up.

```lua
local player = game.Players.LocalPlayer
local tool = script.Parent
local radius = 10
local damage = 10
local rate = 10

local function fireball(target)
    while target.Health > 0 and tool.Parent do
        target.Health = target.Health - damage
        wait(rate)
    end
end

local function findNearestVictim()
    local nearest, nearestDist
    for _,v in pairs(game.Players:GetPlayers()) do
        if v ~= player then
            local dist = (v.Character.HumanoidRootPart.Position - player.Character.HumanoidRootPart.Position).Magnitude
            if dist < radius and (not nearestDist or dist < nearestDist) then
                nearest = v
                nearestDist = dist
            end
        end
    end
    return nearest
end

local function onKeyDown(key)
    if key == "e" and tool.Parent then
        local victim = findNearestVictim()
        if victim then
            fireball(victim.Character.Humanoid)
        end
    end
end

tool.Equipped:Connect(function()
    player:GetMouse().KeyDown:Connect(onKeyDown)
end)
```
Instructions:
1. Put this script in a LocalScript within a Tool object.
2. Place the Tool in the StarterPack.
3. In the game, pick up the tool from your backpack.
4. Press "E" to activate the fireball spell on the nearest player within a 10-stud radius.
5. The affected player will take 10 damage every 10 seconds until their health reaches 0 or you unequip the tool.