Enchant item

Take a day, enchant an item 

the high level spell lets you make a magical item if you can find the materials to do so as listed above first take any item that you would want to enchant and a scroll or tome with an enchantment you want to place on said item I will mention that you can do this with an item that is already magic but this increases the chance of the ritual failing (disadvantage on the enchantment roll) leading to a sentient or cursed item you roll a d20 to see if you succeed in the enchanting process (1-5 cursed, 6-14 sentient, 15-20 success) the DM will choose the curse/sentient's attitude if you fail otherwise you did it you get to choose how the magic effect looks and have fun with your new nuclear toy.

                                                                                                                                 THE ITEMS YOU NEED  

Any fire enchantment: place the item in fire or if you have something like fire salts in your campaign ask your DM if you may use that 

+1+2+3: a bar of silver+1, gold+2, a platinum bar+3 or a diamond worth 100 gold+3 respectively 

Anything else, I trust you fellow DMs are creative enough to give your players something for everything just work with them and you can do anything.