You might have other creations that require command blocks, But you have to ask Migas for them. 
As a security precaution command blocks are completely disabled on the server. You can not obtain them, you cannot use them, and they won't work if activated. Moved topic to the appropriate area of the forums.
Ha, if you do /minecraft:kill @e and then use a repeating command block and put a redstone block next to it xD
I have done that before and I recommend you never do that in your world xD
-Also /minecraft:kill if I am correct (If I am wrong, correct me please 
, its for servers usually. For singleplayer it''s just /kill @e xD
Look, there's something in Minecraft servers called "allow-command-block : true or false" the admins set it to false, so if you obtained a command block in Sentinel craft, you can't activate it.
Also, if you are in a single player minecraft, you can do @a to kill all players, if you use @e, you would kill your [Villagers, Tamed animals etc...]
And using @a or @e would kill all players in the server and go aggressive towards you.
Kill all Entities and Creatures "/kill @"
Kill all entities of a single type "/kill @e[type=wolf]"
Kill yourself only "/kill"
Kill all players "/kill @a"
Kill someone "/kill <PlayerName>"
Don't use these in a server. xD xD
Poll
