Etrata, the Silencer [Guilds of Ravnica Guild Kit] Vampire Skeleton Set: Open the Helvault Type:

Set: Open the Helvault Type: Legendary Creature — Angel Rarity: Mythic Cost: {5}{W}{W}{W} Flying

Set: Commander 2021 Type: Creature — Dragon Rarity: Rare Cost: {3}{W}{W} Flying

It did not

you may spend mana as though it were mana of any type to cast it

and blue and white

Etrata, the Silencer [Guilds of Ravnica Guild Kit] Vampire Skeleton Set: Open the Helvault Type:Set: Guilds of Ravnica Guild Kit Type: Legendary Creature Vampire Assassin Rarity: Rare Cost: {2}{U}{B} Etrata, the Silencer can't be blocked. Whenever Etrata deals combat damage to a player, exile target creature that player controls and put a hit counter on that card. That player loses the game if they own three or more exiled cards with hit counters on them. Etrata's owner shuffles Etrata into their library.