Ok. This is strange. A ghost that blows up and kills you and himself. Makes sense.
THIS IS A COMMAND. COPY AND PASTE IT IN THE COMMAND BLOCK.
Command:
/summon Creeper ~ ~1 ~ {CustomName:Ghost,Visible:1,ActiveEffects:[{Id:1,Amplifier:1,Duration:999999},{Id:5,Amplifier:0,Duration:999999},{Id:6,Amplifier:1,Duration:999999},{Id:12,Amplifier:0,Duration:999999},{Id:14,Amplifier:0,Duration:999999}],powered:1}