Takuya Kanbara

Q:If only this card is in the battle area and I use its [Start of Your Main Phase] effect to digivolve, is the digivolution cost reduced by 1?

A:Yes, the digivolution cost is reduced by 1.

Q:In what order do a [Security] effect, "when [...] performs a security check" effect, and "when a card is removed from [...] security stack" effect activate when they trigger simultaneously upon a security check?

A:[Security] effects take precedence for activation. Upon a security check, a [Security] effect will immediately activate without pending activation. For other triggered effects, the turn player activates their effects first.