I attack with this Digimon, and use its [When Attacking] effect to trash a red Digimon card with 3000 DP in my hand to give this Digimon +3000 DP. If I use an effect to attack again in the same turn and use this card's effect to trash a red Digimon with 1000 DP in my hand, does this Digimon gain a total of +4000 DP? Or does it go from getting +3000 DP to just +1000 DP?
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Official Ruling
The effect persists during the same turn, so the Digimon gains a total of +4000 DP.