By enchanting Firedrinker Satyr with Pariah, you create a self-contained feedback loop that redirects all incoming damage meant for you right back onto the Satyr. When you activate Firedrinker Satyr's ability, it tries to deal 1 damage to you, but Pariah steps in to redirect that damage to the Satyr instead. This triggers Firedrinker Satyr's ability all over again, causing an endless chain of redirected damage that cannot be stopped or interrupted, forcing the game into a draw.