54 cards where the cards have the “sultai” watermark

Abomination of Gudul (Khans of Tarkir #159)
Archers of Qarsi (Fate Reforged #124)
Archfiend of Depravity (Fate Reforged #62)
Become Immense (Khans of Tarkir #130)
Dead Drop (Khans of Tarkir #67)
Death Frenzy (Khans of Tarkir #172)
Dig Through Time (Khans of Tarkir #36)
Empty the Pits (Khans of Tarkir #72y)
Grim Haruspex (Khans of Tarkir #73y)
Gurmag Angler (Fate Reforged #72)
Hooded Hydra (Khans of Tarkir #136)
Hooting Mandrills (Khans of Tarkir #137)
Kheru Bloodsucker (Khans of Tarkir #75)
Kheru Dreadmaw (Khans of Tarkir #76)
Kheru Lich Lord (Khans of Tarkir #182)
Kheru Spellsnatcher (Khans of Tarkir #45)
Marang River Prowler (Fate Reforged #40)
Meandering Towershell (Khans of Tarkir #141)
Murderous Cut (Khans of Tarkir #81y)
Necropolis Fiend (Khans of Tarkir #82)
Opulent Palace (Khans of Tarkir #238)
Qarsi High Priest (Fate Reforged #80)
Rakshasa Deathdealer (Khans of Tarkir #192)
Rakshasa Vizier (Khans of Tarkir #193)
Rite of Undoing (Fate Reforged #49)
Ruthless Ripper (Khans of Tarkir #88)
Sagu Archer (Khans of Tarkir #146)
Scout the Borders (Khans of Tarkir #148)
Set Adrift (Khans of Tarkir #54)
Shambling Attendants (Khans of Tarkir #89)
Sibsig Host (Fate Reforged #82)
Sibsig Muckdraggers (Fate Reforged #83)
Sidisi, Brood Tyrant (Khans of Tarkir #199)
Sidisi's Pet (Khans of Tarkir #90)
Smoke Teller (Khans of Tarkir #151)
Soulflayer (Fate Reforged #84)
Sultai Ascendancy (Khans of Tarkir #203)
Sultai Banner (Khans of Tarkir #225)
Sultai Charm (Khans of Tarkir #204)
Sultai Emissary (Fate Reforged #85)
Sultai Flayer (Khans of Tarkir #152)
Sultai Runemark (Fate Reforged #86)
Sultai Scavenger (Khans of Tarkir #91)
Sultai Skullkeeper (Fate Reforged #53)
Sultai Soothsayer (Khans of Tarkir #205)
Taigam's Scheming (Khans of Tarkir #57)
Tasigur's Cruelty (Fate Reforged #88)
Tasigur, the Golden Fang (Fate Reforged #87)
Temporal Trespass (Fate Reforged #55)
Torrent Elemental (Fate Reforged #56)
Treasure Cruise (Khans of Tarkir #59)
Typhoid Rats (Fate Reforged #89)
Villainous Wealth (Khans of Tarkir #211)
Will of the Naga (Fate Reforged #58)

The message was clear to Sorin—time to search for something else.