The Digimon played using this card's [Start of Your Main Phase] effect digivolved. Is that Digimon returned to the hand at the end of my opponent's turn?
Yes, it's returned. In such cases, only the top card is returned to the hand and all digivolution cards are trashed.
Mar. 28, 2024
When one of my Digimon DNA digivolves into a red or yellow Digimon, does the "1 of your opponent's Digimon gets -3000 DP for the turn" effect activate even if I don't suspend this Tamer?
No, it doesn’t activate. The rest of the effect won't activate if you don't perform the specified action in effects with "by X" conditions.
Mar. 28, 2024