Samurai // Kaito Shizuki Emblem Double-Sided Token [Kamigawa: Neon Dynasty Tokens] Ixalan Promos then Roiling Terrain deals damage

then Roiling Terrain deals damage to that land's controller equal to the number of land cards in that player's graveyard

They likely refer not to one mage

the Aeons Torn is put into a graveyard from anywhere

Set: Commander 2016 Type: Sorcery Rarity: Rare Cost: {6}{B} Choose target player and another target player

Sacrifice Sterling Grove: Search your library for an enchantment card

Samurai // Kaito Shizuki Emblem Double-Sided Token [Kamigawa: Neon Dynasty Tokens] Ixalan Promos then Roiling Terrain deals damageSet: Kamigawa: Neon Dynasty Tokens Type: Token Creature Samurai Rarity: Common Vigilance Reverse Type: Emblem Whenever a creature you control deals combat damage to a player, search your library for a blue or black creature card, put it onto the battlefield, then shuffle.