Life loss from Savra, Queen of the Golgaris first sacrificial ability can be offset by Grim Feast when each other player sacrifices a creature
Serra Ascendant Serra Ascendant is amazing in Commander and weak elsewhere unless youre playing Tier-3 Modern decks
Fun Ranking: Very Fun The Master of Keys The alternate Esper commander that gives enchantments escape
Then you can sacrifice the creature when you activate mana abilities just before paying the cost
Forum Necroscribe Graveshifter Grim Reaper, Lethal Legionnaire Grub, Storied Matriarch Hazel's Nocturne Hex of Undeath Illicit Masquerade It Doesn't Add Up Live or Die Macabre Reconstruction Macabre Waltz Moseo, Vein's New Dean Mourner's Surprise Nullpriest of Oblivion Prison Break Pull from the Grave Queen's Bay Paladin Ral Zarek, Guest Lecturer Rat King, Verminister Sanguine Indulgence Scavenger's Talent Scrounge for Eternity Sidisi, Regent of the Mire Soulcoil Viper The Soul Stone The Terminus of Return Unbury Unliving Legionnaire Valgavoth's Faithful Vampire Soulcaller Viggo, Enforcer of Ig's Crossing Visage of Dread Wail of War Xu-Ifit, Osteoharmonist Zombify Zuko's Conviction
The Avatar wizard is most often played within the MTG Commander format