Quickly before I go on, heres the top ten list from the goodbook study
Despite that, Sapphire and Steel feels like a kinder deck than Emerald and Ruby
VOW Innistrad: Crimson Vow 163 - Uncommon - English "When lost souls wander into the woods, the wilds have a way of showing them who they really are." Rahilda, Vildin-Pack alpha Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Pioneer, Timeless, Vintage Alchemy, Pauper, Standard
Four of these in a deck offer a ton of utility in Standard play, but it's perhaps a bit of a "blink, and it's gone" card in Commander unless you have a way to bring it back from the graveyard to your hand
Cards like Hydra's Growth and Vivien, Arkbow Ranger should ensure this cards toughness produces a ton of counters for your creatures