options:
    zwoj: paper named "zwoj ulepszenia" #pozmieniaj sobie to
    efekt1: poison
    sila1: 1
    czas1: 5
    
command /ulepsz:
    trigger:
        if player has {@zwoj}:
            if player's tool is sword:
                remove 1 {@zwoj} from player
                set lore of player's tool to "&2ULEPSZONY"
                
on damage:
    if lore of attacker's tool is "&2ULEPSZONY":
        apply {@efekt1} {@sila1} to the victim for {@czas1} seconds