Phoenix has Kaiser Glider in face up attack mode

Orion has Jinzo in face up attack mode

There are no spell or trap cards on the field

Neither player has any other cards in their respective hands

If Phoenix or Orion declares an attack on their respective opposing monster (i.e., Kaiser Glider attacks Jinzo, or vice versa), will that monster be destroyed because of Kaiser Glider’s effect, or because of the game mechanics of damage calculation? When, if at all, will Kaiser Glider’s effect activate?

Also, considering the same situation, what happens if Kaiser Glider attacks another Kaiser Glider? Will the 2 monsters be destroyed because of their respective effects, or because of game mechanics? When will their respective effects activate (assuming there are appropriate targets on the field)?

Thanks.

- J -

If the two monsters battle then Jinzo will be destroyed and Kaiser Glider will remain on the field. This is because of Kaiser Glider first effect that states it can't be destroyed in battle by a monster with the same attack points. Kaiser Glider's second ability - to return a monster to its owners hand only activates if its destroyed (doesn't mater how - as long as it ends up in the graveyard)

If two Kaiser Glider's attack each other both will remain on the field.

Jinzo will be destroyed by battle, Glider will remain on the field because of its effect. Kaiser Glider's effect is NOT to destroy a monster BUT not be destroyed by an equal attack monster.

UDE/Netrep

The "same ATK" as "Kaiser Glider" means the same as the current ATK, not the original ATK.

When "Kaiser Glider" is in Attack Position and battles a monster with the same ATK, only the other monster is destroyed.

"Kaiser Glider"'s second effect activates when destroyed and sent to the Graveyard from the field, hand, or Deck.

If "Kaiser Glider" is equipped to "Relinquished" or "Thousand-Eyes Restrict", and is destroyed and sent to the Graveyard, "Kaiser Glider"'s effect activates.