Tengu format ruling
Crusader of Endymion
Card effect (current official text)This card is treated as a Normal Monster while face-up on the field or in the GY. While this card is a Normal Monster on the field, you can Normal Summon it to have it become an Effect Monster with this effect.
● Once per turn: You can target 1 face-up card on the field that you can place a Spell Counter on; place 1 Spell Counter on it, and if you do, this card gains 600 ATK until the end of this turn.
Rulings
- The effect to increase this card’s ATK is resolved only if you place a Spell Counter.
- This effect targets the card you place a Spell Counter on.
- You cannot place a Spell Counter on this card. If "Skill Drain" is activated, this card loses any ATK gained from its own effect.
- If a card like "Breaker the Magical Warrior" is having its effect negated, you cannot place a Spell Counter on it with this effect.
- If the target of this effect is face-down when the effect resolves, no Spell Counter is placed and no ATK is gained.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.