Yawgmoth, Thran Physician has insane synergy with himself and others.
His first ability directly feeds his second, giving you -1/-1 counters to proliferate and cards to pay for it. All he needs is a lotta life and some expendable Minions. Reassembling Skeleton, Endrek Sahr, Master Breeder and Ogre Slumlord give you plenty of bodies to sacrifice to science, then Skithiryx, the Blight Dragon, Ichor Rats and Decimator Web give your opponents poison counters to proliferate. It's a simple, flavorful plan.
But Yawgmoth's a diabolical mastermind, which means even his simple plans have hidden layers. This deck is loaded with cards that synergize with Yawgmoth's abilities. Dross Harvester turns Yawgmoth's first ability into life gain instead of life loss. Necroskitter reanimates the creatures Yawgmoth kills. With two non-Human creatures in play, Mikaeus, the Unhallowed lets you sacrifice them to Yawgmoth over and over for card draw and triggers.
Watch the video to see what other interactions lie beneath the surface.
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