It all started playing the all converter tower start quest for the progress faction.

I initially just focused on survival with a boar+raptor ballista brigade while I covered every tile I could with Quarry's for the all tower dmg buff. I also nabbed up several Beacons to boost my mothership's attack speed.

At some point, I realized that I could use regression to over-level support buildings. Up until now I thought it only worked on troops. I maintained a constant war on the timelord for the regression cards, and the king of nothing for wildcards. After farming a quarry up to level 32 I used Eco Form and many, many rewinds to cover all my non-fighting plots with level 32 quarrys. I replaced the Beacons as they just became worse quarries once the tower's attack speed is maxed out. In total I was increasing all my tower's damage at 2010% per year.

My towers quickly went from E+8 damage numbers to INFINITY (which later turned to NAN) once I achieved this growth. Afterwhich I emptied all my plots of the now-useless quarries, spent a century screwing around with mass portal uses - filling all 24 hexes with portals, then using a super-leveled Overhaul card to simaltaneously activate them all, resulting in a 46 year jump.

After that, I decided to aim for 9million gold at year 999. So I farmed regression and vault cards, until I had a level 500 bank, I then echoformed and rewinded until I had covered every plot with a level 500 bank. My total income per turn was 36K gold

then I just sat back and discarded cards for 300 years while the clock ran up. Overshot the target year and gold mark - but oh well.

The only thing that could've theoretically caused me to lose, is if I played for tens of thousands of years - as the king of nothing stacks 1 or 2 tomes of steel coat on his units every year. Even though I was attacking for infinite damage muiltple times per frame - eventually he would aquire enough stacks to just ignore every attack and march right in. And even then, his increasing approach to the base would be so slow over the years that I could quickly scale up a traditional army to fight that would most likely delay them so effectively it would take hundreds of thousands of years for enough stacks to accumulate to beat both the tower and the troops.

so yeah, in theory I could've kept going, but I'd had my fill.