Arcades, the Strategist Atla Palani, Nest Tender Daretti, Ingenious Iconoclast Doctor Spectrum Dragon Throne of Tarkir Errant, Street Artist Felothar the Steadfast Invisible Woman Invisible Woman, Sue Storm Opal-Eye, Konda's Yojimbo Pramikon, Sky Rampart Rammas Echor, Ancient Shield Sokrates, Athenian Teacher Super-Skrull Teyo, Geometric Tactician Teyo, the Shieldmage The Fantastic Four The Pride of Hull Clade The Walls of Ba Sing Se
And the floating wolf head
Erebos, Bleak-Hearted is a kind of decent support card in a sacrifice deck because it draws you cards for your dying things
With menace that makes it hard to double block
Syr Gwyn notably works quite well with cheap Equipment cards with high equip costs, as this commander allows Equipment cards to be equipped to Knights for zero mana, ignoring equip costs entirely
Any sort of doubling effects can be very powerful in a game of Magic the Gathering and are hot commodities