IntermediateSurvival
Beacon in Minecraft: build the pyramid and pick the right power
In a Crafting Table, put 3 Glass across the top row, a Nether Star between 2 Glass in the middle row and 3 Obsidian along the bottom row.
Tested 26.3

A Nether Star is the trophy dropped by the Wither, needed to build a beacon.
It is the only drop of the Wither and as an item it cannot be destroyed by explosions. With five glass and three obsidian it crafts a Beacon, so each beacon costs one Wither fight.
This item has no crafting recipe.
In a Crafting Table, put 3 Glass across the top row, a Nether Star between 2 Glass in the middle row and 3 Obsidian along the bottom row.
You summon the Wither yourself with 4 Soul Sand and 3 Wither Skeleton Skulls, and it drops the Nether Star you need for a beacon.
It is dropped by Wither.
It crafts beacons. It is an ingredient in one recipe: Beacon.
No: as a dropped item it resists fire and lava.