What if the bomb killed 50% of the targeted territory's armies. It would be a strategy to have more medium stacks instead of one big stack.
this card might be fun in rp games, but it will be extremely unbalancing in casual games. Do you think big stacks are an issue, a specific card should deal with?
Time Travel card is used at the end of a turn. The turn is played as normal, but at the end, all changes are lost, and you start that round over again (Ground hog's day the movie). However everyone would have seen deployments and attacks occur. Everyone would know the outcome of the round if they continue to play that round the same way next time.
Im not sure if I got you right: the turn happens and is undone afterwards, for everyone? which means you only delay the entire game with this card? sounds pointless to me... In fact I will see the outcome of my alliances, with or without the card
I guess there are other suggestions for new cards, that are way more usefull. I would rather suggest a fortified position card, that gives a territory a bonus in cases of defense. which would be similar to the abandon card, but without the disadvantage of turning your units into neutral stacks.
Or maybe a decoy card. If you play this card, your territory will display your opponents a fake number of units ...
Anyways, Im pretty sure there are several things more valueable and worth an upgrade (for example: more informations on the map and profile pages).