Combo of the Day: Upgrade + Fortress

I'm posting this one because I've seen it a few times in the last month or two, and people seem to be unaware of it.

It's pretty simple, and very fast. You just want to trash down as thin as possible, as fast as possible, pick up some Upgrades, a couple Fortresses, and if you can, some draw. Then, having drawn your deck, Upgrade your Fortress into Upgrade repeatedly, until the pile is gone. From there, you can either cash in for 6s, or continue on to other 5s. The important thing is to be very aware of what your opponent can do, because usually you aren't going to be able to finish until a turn after the Upgrades run. Golds are about the worst payoff you might go for, and even here it's enough cash to be quite decent. More often, there will be some pile that empties, or another spammable 5. The plan, usually, is to pile out the Duchies in one fell swoop, scoring 18-24 points, emptying 3 piles, and winning the game.

It's kind of hard to play this perfectly (or maybe I'm just bad at it), and it's pretty hard to play around. Yes, you need to be aware of what your opponents are doing, but honestly, you just don't have tons of counterplay besides trying to be faster.

Examples:

http://gokosalvager.com/static/logprettifier.html?http://dominion-game-logs.s3.amazonaws.com/game_logs/20151110/log.0.1447115920847.txt

http://gokosalvager.com/static/logprettifier.html?http://dominion-game-logs.s3.amazonaws.com/game_logs/20151108/log.0.1447013717412.txt

http://gokosalvager.com/static/logprettifier.html?http://dominion-game-logs.s3.amazonaws.com/game_logs/20151115/log.0.1447612360359.txt