Etrata, Deadly Fugitive [MKM - 200] Condition:Near Mint Whenever you cast a spell

Whenever you cast a spell with mana value 4 or greater

• Destroy target creature

Whenever a face-down permanent you control enters and whenever Cryptid Inspector or another permanent you control is turned face up

Whenever a land enters the battlefield under an opponent's control

I'll test it myself

Etrata, Deadly Fugitive [MKM - 200] Condition:Near Mint Whenever you cast a spellRarity: M #: 200 Creature Type or Sub Type: Legendary Creature Vampire Assassin P: 1 T: 4 Rules Text Contains: Deathtouch Face down creatures you control have "2UB: Turn this creature face up. If you can't, exile it, then you may cast the exiled card without paying its mana cost." Whenever an Assassin you control deals combat damage to an opponent, cloak the top card of that player's library.