If Squall isn't your commander, you can copy its trigger using The Peregrine DynamoThe Peregrine Dynamo, and then sacrifice Dynamo and return it via the copied trigger
Everyone looks around, and all eyes settle on Kellan, looking very human and eminently sacrificial
Finally, here's a list of more generic upgrades to give your deck some more oomph: Urborg, Tomb of Yawgmoth + Cabal Coffers for amazing ramp, Badlands, Blood Crypt, Bloodstained Mire, Cavern of Souls, Graven Cairns, Smoldering Marsh, Sulfurous Springs, Strip Mine, Wasteland, Myriad Landscape Lands: Urza's Incubator, Mana Crypt, Mana Vault, Grim Monolith, Black Market, Thran Dynamo, Gilded Lotus Ramp: Toxic Deluge, Damnation, Oblivion Stone, Perilous Vault Board Wipe: Wheel of Fortune Card Draw: Yawgmoth's Will, Patriarch's Bidding Recursion: Demonic Tutor, Vampiric Tutor, Beseech the Queen, Gamble Tutor: Door of Destinies, Coat of Arms Anthem: More Lists
However, green cards can also have it, usually as a secondary perk, and there are a handful of blues that also use it
Incapsula incident ID: 438000730043788267-128356424814563909
