Sometimes, there is this situation: You are stuck somewhere, surrounded by mobs actively trying to kill you, and you have nowhere to go. What do you do? You try to kill as many as you can, but fail misserably, and die. Better luck next time... because next time you'll make sure to have the InstaSave sword on you. The InstaSave sword will kill all gressive mobs in a 10 block radius, giving you resistance as well. Here you can get the command for the InstaSave sword

How to make the InstaSave sword:
throw on the ground
-an apple
-wheat seeds
-a feather
-a stone sword
to get the InstaSave sword.

The InstaSave sword:
-Kills all agrressive mobs surrounding you
-Is a starter item
-Has only one use
-Does not kill minecraft bosses (that would be too OP)
-Does not kill passive mobs
-Does not kill agressive mobs added after minecraft version 1.8, or in mods