This is a Epic command infact my 5ft . This command is a boss battle funny stuff specially if you kill the Boss its a spawn egg{A modified charged creeper ridding a ghast} i have another one with a spawn cage Wich is the pro version if you want that command This is it.
The spawn egg version is in the normal command place Not description.
Rules For pro command:
You cant brake the spawner until 10mins of surviving.
If you die you have to restart the timer.
The command for the Spawn cage version{Pro version}:
/setblock ~ ~1 ~ mob_spawner 0 replace {SpawnCount:1,MaxNearbyEntities:6,SpawnRange:4,Delay:20,MinSpawnDelay:60,MaxSpawnDelay:120,RequiredPlayerRange:6,SpawnData:{id:"minecraft:ghast",Passengers:[{id:"minecraft:creeper",powered:1,NoGravity:1b,FallFlying:1,ArmorItems:[{id:"minecraft:tnt",tag:{display:{Name:"Charged Tnt",Lore:["TNT Blows up a creeper Blows up","makes sense. "]}},Count:1},{id:"minecraft:flint_and_steel",tag:{display:{Name:"Charged Flint",Lore:["Blow The Charged TNT!!!!"]}},Count:1},{id:"minecraft:diamond",Count:1,tag:{display:{Name:"Glow!!!",Lore:["The Glowing Stuff around the creeper is actually Diamonds!!","","","","Creator Of Command:RichSteve72"]}}},{}],CanPickUpLoot:1b,Health:999999999,Attributes:[{Name:"generic.followRange",Base:500},{Name:"generic.knockbackResistance",Base:1f},{Name:"generic.movementSpeed",Base:10f}],ExplosionRadius:50,Fuse:1200,HandDropChances:[2F,2F],HandItems:[{id:"minecraft:diamond_sword",tag:{display:{Name:"Charged Sword",Lore:["You have received the Charged Sword!! "]},ench:[{id:0,lvl:4},{id:1,lvl:4},{id:2,lvl:4},{id:3,lvl:4},{id:7,lvl:3},{id:16,lvl:5},{id:17,lvl:5},{id:20,lvl:2},{id:21,lvl:3},{id:22,lvl:3},{id:32,lvl:5},{id:33,lvl:1},{id:34,lvl:3},{id:35,lvl:3},{id:48,lvl:5},{id:49,lvl:2},{id:50,lvl:1},{id:51,lvl:1},{id:61,lvl:3},{id:62,lvl:3},{id:70,lvl:1},{id:71,lvl:1}]},Count:1},{}],ArmorDropChances:[2F,2F,2F,2F],ActiveEffects:[{Id:1,Amplifier:0,Duration:2147483647},{Id:3,Amplifier:0,Duration:2147483647},{Id:4,Amplifier:0,Duration:2147483647},{Id:8,Amplifier:0,Duration:2147483647},{Id:10,Amplifier:0,Duration:2147483647},{Id:21,Amplifier:0,Duration:2147483647}]}]}}