My picks here are Luminous Broodmoth, a great recursion piece in white decks, and Shark Typhoon, an overperformer in any Spellslinger build
Normally they're confined to the ultimate abilities of Planeswalkers, and an opponent getting an emblem often spells the end of the game
Death Cloud is harder to leverage than most, though raw mana ramp to ensure you have more lands than your opponents can do the trick
That lets players essentially skip their own turns and make an army of Wolf tokens while doing so
Bloodghast Caustic Crawler Dreadwurm Geyserfield Stalker Guul Draz Overseer Hagra Crocodile Iridescent Vinelasher Ob Nixilis, the Fallen Quest for the Necropolis Retreat to Hagra Scrib Nibblers Skyclave Shade Soul Stair Expedition Surrakar Marauder TL;DR (playtest) Tomb Hex
Giant Oyster, and Abbey Gargoyles get honorable mentions as they did see some play in the early years of the game