Can I only trash cards with the [Machine] or [Cyborg] trait from among the cards revealed from my deck for this card's [Main] and [Security] effects?
Yes, that's correct.
Mar. 28, 2024
What happens when I use this card's effect and only 1 card with the [Machine]/[Cyborg]/ trait is among the cards revealed from my deck?
When only 1 of such cards is revealed, it's added to the hand according to the effect's processing order. You can't trash a card.
Mar. 28, 2024