With The Brothers War , we enjoy the return of the Unearth mechanic, first introduced in 2008s Shards of Alara
1 | The Soul Stone Mana Value: 1B Type: Legendary Creature Infinity Stone Rarity: Mythic Rare Card Text: Indestructible Tap: Add B
After seeing the amount of heavy lifting Queza provides in speeding up the game - because drawing cards is something close to anyone aspires to do - and the total amount of damage you deal across a game, be that deliberate or incidental because someone wheels you while you have Queza out, I grew to like this one a lot
Probably the strongest Horror synergy in Standard involves Thing in the Ice's transform ability, which bounces all creatures except Horrors
Its also another Steel Overseer effect, at Legendary, which is pretty cool too
Playing as if youre on turn four when youre only on turn three puts you ahead of your opponent and potentially can help you win the game