How to build a successful arena deck, by dragonsdemesne:
Step 1: Spin oracle. The card you get is mostly irrelevant, but in this case it was parasite.
Step 2: Put 24 random cards that match the element of the card you picked. Alternately, you may use 'other' cards or form a duo/rainbow if you wish, but it is not necessary. In this case, I chose a death/darkness duo.
Step 3: Add six Shard of Sacrifice. (the most important step, and arguably, the only important step)
Step 4: Watch what was intended to be an SoV/SoSa farm get a 32-4 record in 3 days at rank 40.
Step 5: Watch people inexplicably give you thumbs up for your sucky deck, further padding its rank.
Go Parasite deck!!!! :p I suppose it is rather unique, as I haven't seen my idea done before, but it's really a lousy deck except for the SoSas, or so I thought. I can't even really imagine what's losing to it, other than maybe cremation/speedbow rushes, but against platinum, I don't expect players to be using those. Against slower, weaker decks in the lower leagues, sure, but especially now that very few low hp decks are left up in platinum unless they're really good, and the prevalence of SoSa, rush decks are a poor choice to farm platinum.