Once a creature that has reach because of Sphere Grid's last ability has blocked a creature, removing all +1/+1 counters from that creature or causing Sphere Grid to leave the battlefield won't cause that creature to stop blocking
Emerald cards give players some flexibility in their play, with a range of stats and abilities
I can definitely understand people not putting Yawgmoth, Thran Physician in their top five list as its only played in one deck, which isnt a dominant player in the metagame either, but the card makes the archetype and there arent too many good mono-black creatures in Modern right now
The laundry list of abilities includes a manaless sacrifice outlet, -1/-1 counter distribution, card draw, a discard outlet, and proliferation
Five mana for the beefy 7/7 is great
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