Gundramon

Q:I use this card's [When Digivolving] effect to reveal cards from the top of my deck. If I reveal a 7-cost Option card, do I have to use it?

A:No, this card’s [When Digivolving] effect reads “you may,” so you can choose whether or not to use the Option card. If you don’t use it, you delete 1 of your opponent’s Digimon with a play cost of 4 or less.

Q:If I have 4 or fewer cards in my deck, does this Digimon’s [When Digivolving] effect activate?

A:Yes, it does. Reveal as many cards from your deck as you can, then perform the rest of the effect as normal.