Loyal Retainers [Portal Three Kingdoms] Modern Masters 2015 But according to my calculations

But according to my calculations

Set: Standard Showdown Promos Type: Basic Land — Mountain Rarity: Rare ({T}: Add {R}

When Undercity Sewers enters the battlefield

Set: March of the Machine Prerelease Promos Type: Legendary Creature — Elder Dinosaur Rarity: Rare Cost: {5}{R}{R} Trample

Set: Kamigawa: Neon Dynasty Prerelease Promos Type: Sorcery Rarity: Rare Cost: {4}{W}{W} Choose one or more —

Loyal Retainers [Portal Three Kingdoms] Modern Masters 2015 But according to my calculationsSet: Portal Three Kingdoms Type: Creature Human Advisor Rarity: Uncommon Cost: {2}{W} Sacrifice Loyal Retainers: Return target legendary creature card from your graveyard to the battlefield. Activate only during your turn, before attackers are declared.