Karn, the Great Creator (Stained Glass) [Secret Lair Drop Promos]Set: Secret Lair Drop Promos Type: Legendary Planeswalker Karn Rarity: Rare Cost: {4} 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.

Seek it for answers

Set: Katsu Hero Deck Finish: Regular Type: Weapon Subtype: Dagger (1H) Rarity: Common Class: Ninja Power: 1 Once per Turn Action - [1 Resource]: Attack

Set: Masters 25 Type: Creature — Human Rogue Rarity: Rare Cost: {2}{U}{B} Flash

only chance

If it's an attack reaction card

Set: Kaladesh Inventions Type: Artifact Creature — Thopter Rarity: Mythic Cost: {0} Flying

Whenever Primeval Titan enters the battlefield or attacks

{B}: Regenerate Will-o'-the-Wisp

Set: Seventh Edition Type: Creature — Merfolk Rarity: Rare Cost: {U}{U} Other Merfolk get +1/+1 and have islandwalk

Set: Aquapolis Type: Fighting Rarity: Uncommon Retreat cost: Colorless

Set: Base Set Shadowless Unlimited Type: Trainer Rarity: Uncommon

(Target hero banishes face down a random card from their hand