Step 1. Using a Blast Furnace smelt Royal Alloy. You will receive a block of Rough Royal Emerald.

Step 2. Using a Furnace smelt Rough Royal Emerald. You will receive a block of Shiny Royal Emerald.

Step 3. Using a crafting table put a Nether Fragment with a Nether Star and End Crystal in the pattern in the picture. You will receive a Mythical Crystal.

Step 4. Get a Blazing Netherite Ingot by smelting a Netherite Ingot in a Blast Furnace.

Step 5. Combine all previous materials in the pattern shown in the picture to receive a Advanced Beacon Tier 4!