Well, I believe we can at least keep some useful threads.
For newcomers, there are daily deals in Arena, which are usually card styles, but sometimes there is offered booster pack at lower price (usually for 900 or 800 gold instead of 1000) or direct offer of gold or gems.
The daily deals are refreshed every day, at 3:00 PM GMT.
Today it's gem deal: 400 gems at the price of 300 gems or 1500 gold
For newcomers, there are daily deals in Arena, which are usually card styles, but sometimes there is offered booster pack at lower price (usually for 900 or 800 gold instead of 1000) or direct offer of gold or gems.
The daily deals are refreshed every day, at 3:00 PM GMT.
Today it's gem deal: 400 gems at the price of 300 gems or 1500 gold
Plus borderless styles for all Forgotten Realms planeswalkers.