In addition to regular items, an NPC in each town now offers items you can gamble for, using gold (similar to Gwennen).

Yes.

While it's possible to create a private league for yourself in these events, the Friendly Fire and Polarity Group SSF events will require at least three and two party members respectively in order to deal damage to monsters. The Krangled Passive Tree event doesn't have these restrictions, so it can be played solo.

The number of accounts in a Private League is limited to the number of players the event allows. Accounts can't be removed.

We're keen to continue to augment the list of Private League modifiers, and some of these may make their way there in the future.

Mastery locations are Krangled, but their options are not.

No, polarities are assigned when players enter a zone. The first player to join an instance will be assigned to one polarity and the next will be assigned the other.

It's intentional that everyone gets the same tree so that everyone is trying to solve the same metagame. If it's popular, we'd like to run other variations in the future.

We wanted to try some new things. Historically our events have been focused on having the most broad appeal while also being achievable alongside our development schedule. Getting to experiment with new options means trying a few things that aren't necessarily for everyone but will give us good information for designing events in the future. At the very least, we're hoping that these events will be fun to watch even if some players feel it's not conducive to their personal playstyle.

We have run the two existing endless events (Heist and Delve) a few times already and they'd need a bit of sprucing up to be exciting to do again. Endless Sanctum is potentially a cool idea for the future but not something we want to run alongside the actual Sanctum league.

Because these are niche and experimental, we're wanting to see how they do based purely on the attraction of playing them. At the moment, we're not planning to add any additional prizes.

Yes.

No, the Scion class and Ascendant ascendancy skills will not be available during the Krangled Passives Group SSF Event.

They will be randomised across all Ascendancies, so for example a Necromancer could get Champion nodes.

The actual mechanic of the Friendly Fire event is that players are on different teams, which makes them enemies. This means skills that specifically affect your nearby allies, such as auras, won't work. However, a Keystone such as Conduit would work since it checks for nearby party members rather than nearby allies.