The thing is that theres a high probability youre the only one playing shadow creatures at a given time, which means they can be considered truly unblockable
That seemed like an interesting space to explore
[casthaven]Everflowing Chalice[/casthaven]
Despite being locked into only white and colorless cards, Anti-Venom, Horrifying Healer is a very powerful commander
3 Emet-Selch, Unsundered Esper Terra Gogo, Master of Mimicry Golbez, Crystal Collector Hope Estheim Joshua, Phoenix's Dominant Kefka, Court Mage Kefka, Ruler of Ruin Kuja, Genome Sorcerer Quistis Trepe Shantotto, Tactician Magician Tellah, Great Sage Terra, Magical Adept The Emperor of Palamecia The Lord Master of Hell Trance Kuja, Fate Defied Venat, Heart of Hydaelyn Vivi Ornitier Xande, Dark Mage
If you call it wrong, sacrifice that many permanents