According to the rule, just cannot use during the effect of "Main", but this time it is "Your turn", and offense training is happening during digivolve
As a few already said no Bowmon so that line wasn’t legal. Prior to that at the end phase were you went into Hell you gain a memory from the tamer coming out & that kept it your turn at 0 you couldn’t destroy Hell by its own effect. So that whole scenario wasn’t legal either.
A few things to clarify 1) Will gladiatormon prevents rule deletion? Since sandorimon reduces knightmon DP to 0, it’s considered rule deletion, not deletion by opponent’s digimon effect. 2) Will magnamon get the effect stacked onto it when he is immune?
i will try to answer to what i know 1. no, Gladimon still would be deleted 2. the effect is stacked to Magnamon X BT16, but when he is immune, the stacked effect would not be active, so in case laplace demon choose Magnamon X, when opponent turn start, the stacked efect would be active, unless you have a [Start on your main phase] or [Start of your turn] that remove a security which iirc there is none
