Mana Drain [Commander Legends] Commander 2019 if it wasn't put onto

if it wasn't put onto the battlefield with this ability

The Forest of Argoth has developed a resistance to mechanical intrusion

Set: Secret Lair Drop Series Type: Legendary Creature — Sliver Mutant Rarity: Mythic Cost: {W}{U}{B}{R}{G} {3}: Search your library for a Sliver card

Grimlock smartest Dinobot

Set: Collectors' Edition Type: Land — Forest Plains Rarity: Rare ({T}: Add {G} or {W}

Mana Drain [Commander Legends] Commander 2019 if it wasn't put ontoSet: Commander Legends Type: Instant Rarity: Mythic Cost: {U}{U} Counter target spell. At the beginning of your next main phase, add an amount of {C} equal to that spell's mana value. Enthusiasm is no match for preparation.