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Activated abilities of artifacts your opponents control can't be activated. +1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value. −2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.
May 3, 2019 · A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.
May 3, 2019 · If a permanent has {X} in its mana cost, X is considered to be 0.
May 3, 2019 · Karn's last ability can't get a face-down card in exile, even if you know it's an artifact card.
May 3, 2019 · In a casual game, a card you choose from outside the game comes from your personal collection. In a tournament event, a card you choose from outside the game must come from your sideboard. You may look at your sideboard at any time.
May 3, 2019 · Karn's first ability affects only artifacts on the battlefield. Activated abilities that work in other zones can still be activated.
May 3, 2019 · Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keyword abilities are activated abilities and will have colons in their reminder text, such as equip. Triggered abilities (starting with "when," "whenever," or "at") are unaffected by Karn.
| Archetype | Format | Inclusion | Copies | Decks (n) |
|---|---|---|---|---|
| Raker Shops | Vintage | 100% | 1× | 118 |
| Tron | Legacy | 100% | 4× | 102 |
| Jewel Shops | Vintage | 100% | 1× | 50 |
| Sphere Shops | Vintage | 100% | 1× | 47 |
| PO | Vintage | 100% | 1× | 20 |
| Eldrazi | Vintage | 100% | 1× | 4 |
| Beseech Storm | Vintage | 100% | 1× | 2 |
| Coffers Control | Modern | 100% | 4× | 2 |