It of the Horrid Swarm: Limited
However, this deck is all about Sowing discontent across the table, and turning your opponents against each other like scared villagers facing an unknowable monster
It will also retain its name, colors, and supertypes, but it will be an Aura enchantment with no other types or subtypes
Nekusar is a double edged sword for your opponents, who will most likely take the card draw and accept that life loss as a fair trade (reason why Phyrexian Arena is so powerful and popular)
To find and buy one, you need two things: The name the earliest Japanese cards go by A way to buy from sites that do not ship abroad Neither is complicated, but the terminology used in Japan is unfamiliar to most English-speaking collectors
I didn't do the full calculation for all win%, but the standard deviation of Gems won in Traditional draft is roughly 3x that of Ranked draft