Last Sunday, Viktor "Isildur1" Blom won $100,000 in the "first half" of the SuperStar Showdown against Isaac Haxton, then he continued winning a few hundreds of thousands of dollars the next day. However, Blom's winning streak came to an end on Tuesday when he lost back $100k + another $5k to Haxton when they finished all 2,5k hands of the SuperStar Showdown.
After the match against Haxton, he continued playing $100/$200 NLH and lost more than $200k in about 1,500 hands to the British poker pro Alex "Kany7" Mililar (his SuperStar Showdown opponent on Sunday).
Even though Blom had lost about $300k at that point, he decided to try his luck at the $100/$200 PLO tables. But no luck there either and he ended up losing another $200k to different high stakes regulars. Event though Blom lost a total of $506,000 that day, he's still the world's biggest winner online this month with about $500,000 plus.