Stronghold Assassin [Seventh Edition] XY50 Set: Innistrad: Double Feature Type:

Set: Innistrad: Double Feature Type: Enchantment — Aura Rarity: Uncommon Cost: {1}{B} Enchant creature

Could it be that simple

Set: Time Spiral Remastered Type: Instant Rarity: Rare Cost: {0} Destroy target nonblack creature

Set: XY: Double Crisis Type: Fighting Rarity: Ultra Rare Retreat cost: Colorless

it enters the battlefield with a number of +1/+1 counters on it equal to the number of lands you control

Stronghold Assassin [Seventh Edition] XY50 Set: Innistrad: Double Feature Type:Set: Seventh Edition Type: Creature Phyrexian Zombie Assassin Rarity: Rare Cost: {1}{B}{B} {T}, Sacrifice a creature: Destroy target nonblack creature. The assassin sees only throats and hears only heartbeats.