Cactus Game Design Message Boards

Ok that's fair, I always forget that they changed it a few years back. From the way the second bullet reads, it seems like you can reach-aocp  in SI an evil character in someones territory who just used magic charms to capture you or reach after someone has writ-ed you. Is the second bullet point understood to mean "abilities in battle that are defeating one of the characters you control in battle"?

I think the last sentence of the very section you're referencing answers your question. If it's not clear, please let me know and maybe we can make it clearer in the next REG update.

The phrase “interrupt the battle” includes interrupting the following:
● all active ongoing abilities
● abilities that are defeating one of the characters you control in battle
● the last card played in current battle if it was played by your opponent.
Interrupt the battle only includes such abilities if they were activated on cards in the current battle.

How to Play
A toss ability allows a player to play an enhancement in a different way than usual; instead of activating the numbers or special abilities of the enhancement, the enhancement is discarded to decrease an opposing character by X/X (where X is the strength of the discarded enhancement), regardless of protection or immunity.

Default Conditions
● Enhancements discarded to the toss ability are played from hand.

If the REG says that Tossed enhancements are Played like any other Play ability (Reach of Desperation, Two Thousand Horses, Hidden Treasures, etc.), then Tossing cannot be undone, because Play abilities are inherently CBI. 

In other words, the Play aspect of Casting Stones' Toss ability is inherently CBI, because even if you use an Interrupt The Battle or Negate ability and target Casting Stones, the Tossed enhancements were Played, and CBI is CBI.

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The real question is, is the Decrease aspect of Casting Stones' Toss ability inherently CBI?  In other words, does Negating the Toss negate the decrease?  I think that it should.

I would equate it to playing Foolish Advice after your opponent plays Reach of Desperation --> battlewinner.  Foolish Advice doesn't negate Reach's "Play" ability, so MLaMG stays in battle; however, MLaMG's discard still gets negated by Foolish Advice.

Therefore, negating Casting Stones won't do anything about the Reveal, and the enhancements will stay discarded; but the decrease will still be undone.  I think this is the best interpretation giving the current rules, and also keeps Casting Stones from being a CBI battlewinner that thins your deck up to 3 cards.

Since this topic kind of died, I wanted to confirm what the conclusion is.

1. Can Casting Stones be targeted in SI if the Tossed EEs cause SI?  The answer appears to be "Yes".

2. If the answer to 1 is "Yes", what happens when Casting Stones is negated/interrupted - is the Decrease undone and the Tossed EEs returned to deck, or is just the Decrease undone?  If the Tossed EEs are returned to deck, then the REG definition that says Tossed enhancements are "Played" needs reworked, IMO.