Edison format ruling
Doomcaliber Knight
Card text as printed in this eraⓈ Cannot be Special Summoned.
① If a monster effect is activated (Quick): Tribute this face-up card;
negate the activation, and if you do, destroy that monster.
Rulings
- This effect is Mandatory. It can (and must) activate in any Step and any Phase, including Damage Calculation, and even in response to a effect triggered by an End Phase discard.
- If 2 "Doomcaliber Knight" are on the field, when a monster effect is activated, both are tributedm, and both "try" to negate that monster effect. however, only the one with a Chain Link directly adjacent to that monster effect in the Chain (the first to activate) will actually negate that Monster Effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.