You can Ritual Summon this card with "Chaos Form". Must be Ritual Summoned, and cannot be Special Summoned by other ways. Cannot be targeted, or destroyed by, your opponent's card effects. If this card attacks a Defense Position monster, inflict double piercing battle damage to your opponent.
How to Get
Cannot be targeted by card effects / Cannot be destroyed by card effects
Technically, according to the Effect Description, it's not able to be destroyed by anything. Maybe Duel Links has a bit of wonky code regarding the monster but in a legitimate situation, I don't see a way of killing it (Outside of overwhelming it)
Anything that doesnt mentioning "target" wont apply any "target" effect.
Take ryko for example. It can select ( without targeting ) chaos max dragon with its eff even though you cant destroy chaos max by default.
Different outcome will be applied from sazank . You wont be able to select chaos max since sazank mention "target" in the description.
Unknown Duelist 14days ago
I can't warn you enough Kaiba. Using this monster is dangerous.
Btw, konami should release ash blossom with it too, then yes, they would make huge ammounts of money.