clash-royale
So I've recently got a Legendary Chest:
I really want to get that Inferno Dragon, so is it safe to unlock the Chest now and wait for that new Card? Or do I need to unlock it after it the Inferno Dragon appears?
Otherwise said: Is the Loot inside the Chest determined when unlocking it or when opening it?
The "lost cards on upgrade" is an illusion. (Well, poor interface design, to be percise.)
The upgrade animation shows draining of all cards, but the extra cards are actually saved. If you have enought cards, you can even upgrade a card multiple times in a row.
You should feel free to upgrade your cards without a worry. (Other than spending too much gold.)
You get officially demoted when you reach 50 trophies below the threshold for a given Arena. You will receive an in-game notification when this occurs. Similarly, you get promoted when you reach you cross the threshold listed for a given Arena. You can view the thresholds for all Arenas at any time by tapping the picture of the Arena you are currently in above the "Battle" button on the Battle tab.
As others have noticed, you can visit the Arena above or below your Arena, if you are close to the threshold and get matched with someone who has qualified for that Arena. Chests you are awarded for victory will be locked to the Arena where the match took place.
Note however, that the Free Chest, Crown Chest, and Shop will all reflect Cards and Gold according to the Arena you are actually qualified for. This is the main difference of being on one side or the other of the threshold.
Best Answer
Cards are determined on open.
Source: Orange Juice's channel. Pretty sure he gets info directly from SuperCell.