The individual flips are still 50/50, but the compounded probability is not. To get heads: First flip = 50/50. Second flip = 50/50. What that means is you have a 25% chance of getting TWO heads in a row. Here are the 4 options of results: Heads/Heads = 25% Heads/Tails = 25% Tails/Heads = 25% Tails/Tails = 25% One flip further: Heads/Heads/Heads = 12.5% Heads/Heads/Tails = 12.5% Heads/Tails/Heads = 12.5% Heads/Tails/Tails = 12.5% Tails/Heads/Heads = 12.5% Tails/Heads/Tails = 12.5% Tails/Tails/Heads = 12.5% Tails/Tails/Tails = 12.5% For something to occur of the possibilities for the Warlock that many times in a row is statistically improbable, because if it were RNG, it would be nearly impossible, due to lack of computational error. Because it would roll what class item type it is + what actual item. Of the 4 armor types and six possible options for chest...it's even less than the coin flip example.