Bluum Erkis, Flare Guardian/Rulings


 * Q: Bluum Erkis would break a shield, and it's a spell that has "shield trigger." Do I have to cast that spell?
 * A: Yes, even if it might be bad for you.


 * Q: I'm casting one of my opponent's spells, and it refers to "your opponent." Does that mean me, or does that mean him?
 * A: It means him. Even though your opponent owns the spell, you're the one casting it. This also means that any ability that triggers when you cast a spell (such as your opponent's Ice Vapor, Shadow of Anguish) will trigger. Any ability that triggers when your opponent casts a spell won't trigger.


 * Q: Bluum Erkis would break a shield, and it's a creature that has "shield trigger." Do I get to summon it? Does my opponent?
 * A: You can't summon it, because Bluum Erkis only lets you cast your opponent's spells that have "shield trigger." A creature isn't a spell, so your opponent puts it into his hand after showing you what it is. Since he has now put a creature that has "shield trigger" into his hand from his shield zone, he can use its "shield trigger" ability.


 * Q: Alcadeias, Lord of Spirits is in the battle zone, preventing players from casting non-light spells. Bluum Erkis would break a shield, and it's a darkness spell that has "shield trigger." What happens?
 * A: Alcadeias prevents you from casting the spell. Then you put it into your opponent's graveyard.


 * Q: My opponent has a tapped Cryptic Totem in the battle zone. It says "While this creature is tapped, your opponent can't use the "shield trigger" ability of his shields." I attack my opponent with Bluum Erkis and it would break a shield. That shield is a spell that has "shield trigger." What happens?
 * A: You cast the spell. Bluum Erkis's ability lets you cast one of your opponent's spells with "shield trigger" for no cost, but you're not actually using the "shield trigger" ability of that spell. You're using Bluum Erkis's ability to cast it. (Furthermore, Cryptic Totem's effect isn't relevant because you're casting your opponent's shield, not your own.) This means that any ability that triggers when a player uses the "shield trigger" ability of a spell won't trigger when you use Bluum Erkis's ability.

Q: Bluum Erkis would break a shield, and it's Boomerang Comet. This is a spell that has "shield trigger" that says "Return a card from your mana zone to your hand. After you cast this spell, put it into your mana zone instead of your graveyard." What happens?
 * A: You cast Boomerang Comet. You return a card from your mana zone to your hand. Then you put Boomerang Comet into your opponent's graveyard because that's what Bluum Erkis tells you to do. Since you were never going to put Boomerang Comet into your graveyard, its effect that says to put it into your mana zone instead of your graveyard doesn't apply.