Arena Block

Arena Block, also known as Arena Tile or simply Arena, is an unobtainable block encountered only during the Supreme Calamitas fight. It is almost completely indestructible, unable to be mined with any pickaxe or destroyed with any explosives, only able to be broken by the Crystyl Crusher.

It is spawned in a large box formation around the player immediately after they use the Eye of Extinction. This box varies in size depending on the difficulty mode, being 159x159 (inner available area 157x157) blocks in Normal Mode, Expert Mode, Revengeance Mode, and 127 (inner available area 125) blocks in Death Mode and during the Boss Rush. Once either the player or Supreme Calamitas dies, Arena Blocks will break when they are within the vicinity of the player.

Trivia

 * In previous versions of the mod, Arena Blocks used an old texture for Charred Ore.