建议在1.8.1的版本下在命令方块里输入此指令，1.8不知道行不行，输好指令后用红石块激活命令方块，然后快跑。
如果你不知道如何获得命令方块，请输入以下指令：／give @p minecraft:command_block
火球指令（生成完成后看木牌上的字，右键上面的木牌，你会获得神之火球（虽然是雪球，但是丢出去是火球））
/summon FallingSand ~ ~1 ~
{Block:redstone_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill
~ ~ ~1 ~ ~-24 ~1
redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill
~ ~2 ~ ~ ~-25 ~1
air},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~3 ~-7 ~ {Block:command_block,Time:1,TileEntityData:{Command:fill ~
~ ~-1 ~6 ~ ~1 quartz_block}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard
objectives add Fire
dummy},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~4 ~-15 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Snowball] ~ ~ ~ /summon Fireball ~ ~ ~
{direction:[0.0,0.0,0.0],ExplosionPower:7}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/scoreboard
players add @e[type=Fireball] Fire 1},Time:1,}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~5 ~-14 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=12] ~ ~ ~ /fill ~4 ~4 ~4 ~-4 ~-4 ~-4
air},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=15] ~ ~ ~ tp @e[type=!Fireball,r=7]
@e[type=Fireball]},Time:1,}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~6 ~-13 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=1] ~ ~ ~ /particle portal ~ ~1 ~ 1 1 1 1 50
force},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~7 ~-12 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=7] ~ ~ ~ /effect @e[r=5] minecraft:wither 10 3
true},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~8 ~-11 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=7] ~ ~ ~ /fill ~2 ~2 ~2 ~-2 ~-2 ~-2
air},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~9 ~-10 ~-1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/entitydata
@e[score_Fire_min=84]
{ExplosionPower:15}},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~4 ~-10 ~1 {Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=1] ~ ~ ~ /fill ~1 ~1 ~1 ~-1 ~-1 ~-1
air},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=13] ~ ~ ~ /entitydata @e[r=15]
{Fire:250s}},Time:1,}}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~5 ~-9 ~1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=1] ~ ~ ~ /particle flame ~ ~1 ~ 1 1 1 0.07 30
force},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~6 ~-8 ~1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=16] ~ ~ ~ /effect @e[r=15] minecraft:wither 10
3
true},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~7 ~-7 ~1 {Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=13] ~ ~ ~ /effect @e[r=10] minecraft:wither 10
3
true},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~8 ~-6 ~1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[type=Fireball,score_Fire_min=10] ~ ~ ~ /execute @e[r=5,type=!Fireball] ~ ~ ~
summon LightningBolt ~ ~ ~},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:summon
FallingSand ~9 ~-5 ~1
{Block:quartz_block,Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:/execute
@e[score_Fire_min=85] ~ ~ ~ /summon Fireball ~ ~ ~},Time:1,}}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:gamerule
commandBlockOutput
false},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill
~3 ~-6 ~ ~9 ~-5 ~ redstone_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock
~3 ~-5 ~-1 command_block 0 replace {Command:fill ~ ~ ~1 ~6 ~1 ~1 stone 0
replace
redstone_block}},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:setblock
~3 ~-4 ~1 command_block 0 replace {Command:fill ~ ~ ~-1 ~6 ~1 ~-1
redstone_block 0 replace
stone}},Time:1,Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock
~1 ~-2 ~ wall_sign 4 replace {Text1:"{text:'神之火球',clickEvent:{action:run_command,value:\\\\"/give @p
snowball\\\\"},bold:true,color:red}",Text2:"{text:'作者:ZCH',bold:true,color:blue}",Text3:"{text:'右键获得雪球',bold:true,color:gold}",Text4:"{text:'',color:black}"}},Riding:{id:FallingSand,Block:command_block,Time:1,TileEntityData:{Command:setblock
~1 ~-2 ~ wall_sign 4 replace
{Text1:"{text:'',clickEvent:{action:run_command,value:\\\\"/fill ~ ~-1
~-2 ~9 ~3 ~2 air 0 replace\\\\"},color:black}",Text2:"{text:'右键移除系统',color:red}",Text3:"{text:'',color:black}",Text4:"{text:'',color:black}"}},Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill~2 ~-1 ~-2 ~10 ~0 ~2 glass 0 replacequartz_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill~3 ~ ~-1 ~9 ~4 ~1 air 0 replace quartz_block},Time:1,Riding:{id:FallingSand,Block:command_block,TileEntityData:{Command:fill~2 ~ ~-2 ~10 ~3 ~2quartz_block},Time:1,Riding:{id:FallingSand,Block:stone,Time:1}}}}}}}}}}}}}}}}}}}}}}}}}}}
