Phantoms are vanilla's punishment for skipped sleep: after three in-game days without a bed or a death, they materialize in the night sky and dive at whoever kept the insomnia statistic ticking. As the only flying undead, they mix aerial pathing with the whole undead rulebook — sunlight ignition, Smite vulnerability, and healing potions that hurt instead of help.
Summoning them directly skips the insomnia bookkeeping and puts a swooping attacker exactly where an encounter needs one. Pad customHealth to turn a 20-health nuisance into a proper night miniboss, add glowing so players can track dives against a black sky, or combine no_ai with no_gravity to hang a frozen specimen over a haunted build — without the gravity trait, a disabled phantom simply drops out of the air.
Night terror miniboss
/summon minecraft:phantom ~ ~ ~ {PersistenceRequired:1b,Glowing:1b,CustomName:"Night Terror",CustomNameVisible:1b,Health:60f,attributes:[{id:"minecraft:max_health",base:60}]}Triple the default health with a glowing outline and a name bar reads as a boss phase; persistent stops the despawn timer from eating it before dawn.
Frozen rooftop haunt
/summon minecraft:phantom ~ ~ ~ {NoAI:1b,NoGravity:1b,Silent:1b}no_ai alone leaves the mob subject to gravity, so pairing no_gravity is what actually keeps it hovering in place over the build.
Daylight patrol flyer
/summon minecraft:phantom ~ ~ ~ {Fire:-32768s,PersistenceRequired:1b}Undead sunlight burn is what normally clears the sky at sunrise; fire immunity lets this one keep circling through the day shift.
Skeleton bomber run
/summon minecraft:phantom ~ ~ ~ {Passengers:[{id:"minecraft:skeleton"}]}A skeleton passenger fires from the phantom's back during dives, turning a melee swooper into a strafing archery platform.
Phantoms burn in direct sunlight like zombies and skeletons. Apply the fire_immune trait, keep the encounter underground or at night, or give the area a solid roof to block sky light.
20 health, the same as a zombie, which melts fast against endgame gear. Setting customHealth between 40 and 80 keeps a dive-bombing miniboss alive long enough for players to learn its pattern.
Yes — the avoidance is behavioral, not tied to how the mob spawned. Any summoned phantom with AI enabled steers clear of cats just like a natural insomnia spawn.
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