Murkfiend Liege is the best for Commander, seeing as the untap ability is king in that format, but nothing stops you from playing, say, Glen Elendra Liege in a UB fairies deck
Four different versions of the Green Goblin himself are coming in this set a Norman Osborn who transforms into the classic Green Goblin, Green Goblin, Nemesis, Ultimate Green Goblin, and Green Goblin, Revenant all of which also utilize the same keyword and discard mechanics in the Blue, Black, and Red colors
Niv-Mizzet, Guildpact While arguably not even in the top 3 or 4 Niv-Mizzets, Niv-Mizzet, Guildpact has one of the strongest saboteur abilities available
Icatian Town from Fallen Empires was another additional way to create even more weenies, while Serra Bestiary from Homelands allowed you to pacify one of your opponents larger creatures, keeping all your weenies a bit safer
The Ravenous Tyrannosaurs card is a true stunner, especially with the foil finish
Typos are much more common than you might think