Callidus Assassin (Surge Foil) [Warhammer 40,000] Narset +1: Create an X/X green

+1: Create an X/X green Phyrexian Horror creature token

any time you could activate a mana ability

Set: The Brothers' War Commander Type: Artifact Land Rarity: Uncommon Indestructible

Set: The Brothers' War Type: Instant Rarity: Common Cost: {W} Target artifact or creature gains hexproof and indestructible until end of turn

Supporting this hteory

Callidus Assassin (Surge Foil) [Warhammer 40,000] Narset +1: Create an X/X greenSet: Warhammer 40,000 Type: Creature Human Shapeshifter Assassin Rarity: Rare Cost: {4}{U}{B} Flash Polymorphine You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield, except it has When this creature enters the battlefield, destroy up to one other target creature with the same name as this creature.