Seven Player Catan

Any player may make a trade offer to another
target player any amount of times during their
turn, but only as a sorcery. Only permanents
and/or cards in hand can be traded this way.
(Reveal cards in hand before being traded.)
At the beginning of each player's upkeep, they
roll 2d6. If the total is 7, they may either gain
control of target nonland permanent, or another
target player of their choice must give a card in
their hand to them.