Power Surge [Unlimited Edition] Dominaria Promos Karn accidentally took the life

Karn accidentally took the life of another

{2}{U}: Counter target activated ability

Set: Onslaught Type: Instant Rarity: Uncommon Cost: {U} Return target nonland permanent to its owner's hand

Set: Duel Decks Anthology Type: Instant Rarity: Common Cost: {1}{U} You may return an Island you control to its owner's hand rather than pay this spell's mana cost

If there are no mining counters on Gemstone Mine

Power Surge [Unlimited Edition] Dominaria Promos Karn accidentally took the lifeSet: Unlimited Edition Type: Enchantment Rarity: Rare Cost: {R}{R} At the beginning of each player's upkeep, Power Surge deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.