Creeperstone

Creeperstone is the block that is textured like a creeper. It is used to spawn Creepers:
Creeper Spawning
none 	
CreeperHead	none
none 	Creeperstone	none
none 	Creeperstone	none
none 	Creeperstone	none
Creeperstone	Creeperstone	Creeperstone
Creeperstone	none 	Creeperstone
...or the Mutant Creeper:
Mutant Creeper Spawning
none 	none 	CreeperHead 	none 	none
none 	Creeperstone	Creeperstone	Creeperstone	none
none 	Creeperstone	none 	Creeperstone	none
Creeperstone	Creeperstone	Creeperstone	Creeperstone	Creeperstone
Creeperstone	none 	Creeperstone	none 	
Creeperstone
Creeperstone	none 	Creeperstone	none 	Creeperstone
Creeperstone	none 	Creeperstone	none 	
Creeperstone
...and can be used for traps because of their unique ability to explode when a redstone or tripwire pulse is taken to it.
Category:Creepers
Category:Blocks
Category:Mob Blocks
Category:Spawn Blocks
Category:Mobs
Category:Hostile Mobs
Category:Entities