Fun fact: Charnel Troll has a template that hasn’t been used before. (Well, technically on one un-card, but I’m not about to use that for precedent!) This has led to a question of whether the “otherwise” on the trigger means “if you don’t” or “if you can’t”. This matters because the former is a trigger with a default action, while the latter is an ordinary trigger. If it’s a default action, then missing the trigger means that the Troll will meet an untimely death when it’s discovered.
After discussion with Wizards, the pro-Troll faction has emerged triumphant. It gets to live! Because the first part is mandatory, the “otherwise” is directly tied to it and not a generic catch-all for when it doesn’t happen. The Troll has no default action as part of the trigger. (Note that if the opponent puts the ability on the stack, you can’t discard cards to save it; you must remove a card that was there when the ability would have resolved correctly).
We’ll look into updating the definition to account for this new template in the next IPG release. In the meantime we return to our more usual trolling.
Just to clarify – if you miss the trigger and it’s noticed later, you can activate the Troll’s handy discard ability as many times as you want (if you have mana & cards) – but none of the creature cards you discard *at that time* can be chosen when you resolve the trigger.
If you didn’t miss the trigger, you can activate that ability in response, and exile the newly-discarded creature card when the trigger resolves.
If you don’t miss the trigger during your upkeep, you can activate the ability in response to the trigger, so it seems weird that you can’t do it later.
I think it’s worth mentioning that the reason (I guess) is to prevent the player from gaining any advantage by adding creatures to their hand between the time the trigger was missed and the time it actually resolved.
So question if I Jump-Start a Chemister’s Insight and draw the cards before discarding is it handled the same way we handle a Rummaging Goblin activation that has drawn before discarding?
For the purpose of using the Rummaging Goblin fix would the infraction or fix change if the discard is part of the cost instead of the effect?
Example instead the ability being “{T}, Discard a card: Draw a card” it was “{T}: Discard a card. If you do draw a card”