Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] Planeshift Promos especially if the job is

especially if the job is blasting Phyrexians in the face

If an attack action card is revealed this way

Set: Double Masters 2022 Type: Legendary Planeswalker — Liliana Rarity: Mythic Cost: {1}{B}{B} +1: Up to one target creature gets -2/-1 until your next turn

Set: Streets of New Capenna Type: Legendary Creature — Human Warrior Rarity: Rare Cost: {3}{R} {R}

Set: Expedition: Base Set Type: Fire Rarity: Holo Rare Retreat cost: Colorless

Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] Planeshift Promos especially if the job isSet: March of the Machine: The Aftermath Type: Legendary Artifact Creature Golem Rarity: Mythic Cost: {5} Karn, Legacy Reforged's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add C for each artifact you control. This mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.