3 official rulings from Bandai, last ruled Jun 28, 2024. Straight answers to how this card actually resolves.

What happens if this card's <On Play> <When Digivolving> effect is given to a Digimon that activated a "this Digimon isn't affected by your opponent’s effects until the end of your opponent's turn" effect?
A Digimon with a "this Digimon isn't affected by your opponent’s effects" effect can also be chosen as a target for this effect, therefore your opponent's Digimon will be affected by this card's effect as soon as it loses the "this Digimon isn't affected by your opponent’s effects" effect. As a result, it's deleted at the <End Your Turn> timing.
Ruled Jun 28, 2024
What does this card's "when [...] would leave the battle area other than by [...] a battle" mean, exactly?
"When [...] would leave the battle area other than by battle" refers to when this Digimon is placed in the trash other than as a result of a battle, returned to the hand/deck, placed in the security stack, moved to the breeding area, or placed under another card.
Ruled Jun 28, 2024
Can I use this card's <All Turns> effect to delete an opponent's level 5 or lower Digimon and prevent this card from leaving the battle area?
Yes, you can.
Ruled Jun 28, 2024
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Questions and answers are Bandai's official rulings, collected and translated by the DigimonCardGame Wiki community and reused here under CC BY-SA. Card names and card text are © their respective publishers; Combalo is not affiliated with Bandai.