Viser Des has an effect that allows you to select a monster on your opponents side of the field and that monster will be destroyed on your 3rd standby phase after the effect activating, Viser Des then cannot be destroyed in battle until the effect is resolved.

Follow these steps to find the loophole.

Step 1: Summon Viser Des in Attack mode (activates effect quicker) and apply the effect to the desired monster.

Step 2: Destroy that monster before your 3rd standby phase after summoning Viser Des.

Step 3: enjoy the loophole.

You will notice that Viser des now cannot be destroyed by battle since his effect cannot be resolved because the monster you chase as the effect target is in the graveyard. even if your opponent revives the monster, the effect will still not resolve.

This can work in all other games containing Viser Des