EldritchFire wrote:That, unfortunately, doesn't work. In order to keep a second effect die, you need to spend a doom die of that size or larger (OM16).
It does too, you just have to have the right circumstances... which aren't too hard to achieve.
First, you need a villain who can throw out effect dice that are larger then the dice you have in the doom pool to start with - Constrictor isn't likely to grow the doom pool in this fashion very much as he's chucking mostly d8; but Graviton can lob d10's and d12's pretty easily.
Second, your doom pool needs to have a few spare dice sitting around equal to what the villain will have as potential extra effect dice. Typically you'll want d8's, maybe a d10 if you're aiming high, and d6's might work if they're using a SFX that grants extra d6's such as weapons, area attacks, or complications.
Then it's just a matter of pulling off the action roll using just 2 dice... this is the risky part, as most heroes can oppose pretty well, so it's probably best to grandstand as the main narrative action to make it harder to oppose and then use your spare effect die to punish whoever tries to oppose you...
Example: Your doom pool is 2d6 and a d8.
Graviton grandstands by tearing up the local environment and chucking bits of scenery here and there.
His die pool is Solo d8 + Vain d8 (he's probably gloating) + Gravity Supremacy 2d10 (stepped back and doubled from Versatile) + Science Mastery d10 (He's controlling gravity, that's SCIENCE!).
If he gets a good roll on 2 dice, he could grandstand with a d10 Effect die (even if two of his 10's roll well he still has a spare 3rd) and then pull a d8 from the doom pool and keep one of his 2d8's for an additional Effect to cause stress to who ever tried to oppose him. If he succeeds then the doom pool is down a d8 but up a d10 and a hero ate some stress.
Down side to this is you're gambling on succeeding and if the hero beats you your doom pool has shrunk. Also you can only keep a d8 for an extra effect die so you might end up without a d8 to actually keep - for Graviton it'd make sense to split Science Master into 2d8 to up the odds of getting one you could keep.
Alternatively, if you have a doom pool that is a big pile of many smaller dice you could probably swing something where you add them into your roll and keep them for the result in hopes of getting a higher total and converting them to a single bigger die from grandstanding.
Example: Doom pool is 6d6
Graviton grandstands again but this time doesn't step back his Gravity Supremacy or or his Science master and also adds in 2d6 from the doom pool. As long as those d6's don't come up 1's he could spend 2d6 from the doom pool and add them to his result and use his d12 or d10 as his Effect die and the doom pool would change to 2d6 + 1d12(1d10) if he succeeds. You could also probably drop 2pp and put those d6's back in the doom pool if you REALLY felt the need.