Rulings and Errata
1.) Players cannot trade after any player hits or passes the winning point threshold.
2.) Rift Limit (Classic Mode variant recommended for 1v1): There's a Rift limit equal to the number of players. At the beginning of a player's turn, if there are more cards in the Rift than the limit, that player shuffles the Rift cards and deals them face-down among both players, dealing the player who went last first. Players are dealt cards regardless if they don't have any cards they own in the Rift. In 1v1, the second player starts the game with an additional card in their hand.
3.) The Demonmaster is not affected by the monster threshold.
4.) Only cards in your hand can be traded/bartered, nothing else. You may give a player cards without receiving any cards from them.
5.) The standard setup for the monster deck is 6x Goblins, Dragonling, Imp, Grimwood, Mawborn Specter, Reaperhound Guard, Giant Bloodbat, Lava Dragon, Doom Demon, and 1x Taavax, Dranas, Shadewalker, Nagic, Skywrath, Xurgar.
6.) Player elimination optional rule: Rather than have the surviving player duel monsters over multiple turns until they hit the point threshold or get eliminated, the surviving player just has to prove themselves for 1 turn. So if a player survives their turn after everyone else is eliminated, that player wins. This will make elimination victories a little easier to achieve.
*a rules error in the vid: Players that don't have cards in the Rift aren't dealt Rift cards.