Commerce is an Event from .
 Official FAQ
- First count how many differently named cards you have gained this turn, then gain that many Golds. For example, if you have gained two s, a , and a , you would gain three Golds.
 English versions
|| Gain a Gold per differently named card you've gained this turn.
|| March 2020
 Other language versions
|| Nimm pro Karte mit unterschiedlichem Namen,
die du in diesem Zug genommen hast, ein Gold.
Commerce makes some amount of , depending on the variety of cards you've gained
this turn. an for a and a and you're well on your way.
 Secret History
A late one. At first it was "gain a , gain a per card you've gained this turn." It seemed too generous and lost the . It was too strong with -gainers, too expensive (at ) otherwise; so, it counts differently named cards, Matt's suggestion.