No sense of direction card For the following turn, wherever your opponent transfers armies, they will instead head to any random other territory they border.
stefano36000 card Can only be used in games with at least three players. You pick which other player you play it on. That player will, at an unforeseen moment from next turn to in 36 turns, suddenly be eliminated without any warning or explanation. Nobody except you can see that the card was played.
Nuke card. After 100 games played (or for every 100 games), players receive a 'nuke card' they can use in a ffa game to automatically win...or to eliminate another player.
Tsar bomb card Can be played on any opponent's territory you border. The bombed territory loses 100% of its armies, all bordering territories lose 60% and all territories bordering these (two away) lose 20%. Hence, your own territories are bound to suffer too.
INSS card / Landria card / Normal card (Although it's kinda impossible for coding)
For some reason, the income system is switched to INSS or landria mode or normal mode when playing on an alternative income system for 1 turn. However, it's random on which system you end up on.
Airstrike card Like an airlift card, except that it kills a certain number or percentage of armies instead of transferring them. Can be played on fogged territories too, in which case you will not see the impact.
Zombie Apocalypse card. A card can be used to drop into a specific location of an opponent. That location turns into a 'zombie' haven and expands 5x on attached territories for every turn. Extra cool if there were actual little zombies on the territories walking around.
Alien invasion card Like an intervention card, except that it has preferred kill rates and/or starts with 1000 armies. The last player to survive the alien invasion wins.
Kamikaze card You attack with your entire stack available in that territory (as in no-split mode) and have a 50/50 chance to either kill your opponent's stack in full or kill nothing. Your stack will be eliminated in full for sure. However, you can attack a much larger stack with a much smaller stack, even as little as one army.
Final days card Every turn from now on, an ever increasing number of player territories becomes neutral. The last player to stand wins. Essentially, you now have to hold as many territories as possible for as long ss possible, irrespective of bonuses.
Friendly fire card All transfer moves of your opponent the following turn will behave as attack moves. Armies will be killed, but no territories change ownership in this way.
Platinum card Instead of AbbAAbb, the move order behaves in a random way of half As and half Bs. Sometimes it will be BABABABA, sometimes AAABAABBBB etc.
Multi-transfer card Allows you to transfer in the multi-attack way for one turn. If the streak is interrupted by an attack, further transfers are not possible.