Brewing ingredient from Magma Cubes used to make Potion of Fire Resistance and craft Magma Blocks.
Guide
Find Magma Cubes in Nether Wastes, Basalt Deltas, or Bastion Remnants and defeat large ones.
Combine 1 Slimeball with 1 Blaze Powder in any crafting grid to produce one Magma Cream.
Run a swamp Slime farm at night and a Blaze spawner in a Nether Fortress for steady ingredients.
Place Magma Cream above an Awkward Potion in a Brewing Stand for a 3-minute Fire Resistance potion.
Place 4 Magma Creams in a 2×2 square to make 1 Magma Block for bubble elevators and traps.
Carry 8 Magma Creams when fighting the Wither so you can quickly re-brew Fire Resistance between phases.
Craft it from 1 Slimeball and 1 Blaze Powder in any crafting grid.
Awkward Potion plus Magma Cream creates a Potion of Fire Resistance lasting 3 minutes.
Four Magma Creams placed in a 2×2 square craft one Magma Block.
No. Only large and small Magma Cubes drop 0-1 Magma Cream each; tiny cubes drop nothing.