Does this card's inherited effect activate even when a card is trashed from my hand by my my opponent's effect?
Yes, it activates.
Mar. 28, 2024
I used [BT7-112 Susanoomon]'s effect to return 10 Tamer cards and/or cards with the [Hybrid] trait to the bottom of my deck, then I chose to trash [BT7-112 Susanoomon] instead of digivolving it. Does this card's inherited effect still activate in such cases?
No. It doesn't activate in such cases because [BT7-112 Susanoomon] is trashed by the rules, not an effect.
Mar. 28, 2024