🔫COMBINE item

➡️Why should I COMBINE my Items?➡️How can I COMBINE an ITEM?➡️What are the success probabilities of COMBINE an ITEM?➡️Do I get to keep the 3 ITEMS that I used in the COMBINE?➡️I want to do a combine but i get an error message. What should i do?➡️Can I COMBINE ITEMS to level 7 or 8?