on right click:
    player is sneaking
    set {_itemName} to name of player's tool
    {_itemName} does not contain "+"
    if player's offhand item is iron nugget:
        set name of player's tool to "&f%{_itemName}% &a+鉄塊"
        synthesize()
    if player's offhand item is spider eye:
        set name of player's tool to "&f%{_itemName}% &a+クモの目"
        synthesize()

function synthesize():
    remove 1 of player's offhand item from player
    play sound "ui.button.click" with volume 1 and pitch 2 at player

on damage:
    attacker is a player
    attacker's tool is not air
    player does not have player's tool on cooldown:

    set {_itemName} to name of attacker's tool

    if "+鉄塊" is in {_itemName}:
        set damage of event to (damage of event + 2)

    if "+クモの目" is in {_itemName}:
        apply potion of poison of tier 2 to victim for 5 seconds