The new Ulamog exiles half an opponent's library when you cast them, and then uses the number of exiled cards to power itself up
Amber Gristle O'Maul Balthor the Defiled Balthor the Stout Barrowin of Clan Undurr Bruenor Battlehammer Cadric, Soul Kindler Cayth, Famed Mechanist Depala, Pilot Exemplar Gimli of the Glittering Caves Gimli, Counter of Kills Gimli, Mournful Avenger Giott, King of the Dwarves Glin, Dwarf Emissary Hofri Ghostforge Irini Sengir Koll, the Forgemaster Krile Baldesion Magda, Brazen Outlaw Magda, the Hoardmaster Papalymo Totolymo Rankle and Torbran Reveka, Wizard Savant Reyav, Master Smith Shantotto, Tactician Magician Sram, Senior Edificer Sram, Senior Edificer Tataru Taru Torbran, Thane of Red Fell Vihaan, Goldwaker
Whenever an opponent discards a land card, create a 1/1 black Bat creature token with flying
A zombie dwarf legend, which should tell you enough, Balthors two abilities are to strengthen minions, or bring back all red or black creatures in everyones graveyards to play