Does anyone know if there is an equivalent to these cards in the old version (including all expansions)?
If not, it would be really sweet if this could be purchased separately, as add-on to the old version.

No, there were no similar elements in the 1st edition + expansions.

I doubt that they will be purchasable separately.

tides of battle cards are the modern equivalent of playing war.

I play strategy games, i outplay and out think my opponents to win, not to win or lose on the flip of a coin.

want to make things interesting...

have 10 cards dealt to each player, and use no more than 1 per turn (if applicable) at their discretion to use knowingly with their house combat cards.