Sentry Dash Boss [V2, only has a boss test]

this is a updated sentry dash, a known as Entity.SentryDash.name, every time to kill this boss, is so hard to kill it, so is new updated for 1.0.2 for my command list update called Angrous for Alive Command List of my command list testing, and this is a new feature in this mob, so i can make it alive boss for 400 health and there's a command Command - /summon minecraft:magma_cube ~ ~1 ~ {Size:3,Passengers:[{id:"minecraft:magma_cube",CustomName:"\"entity.SentryDash.name\"",CustomNameVisible:1,Size:10,Health:400,Attributes:[{Name:"generic.maxHealth",Base:400}]}]}