Thieves' Guild Enforcer (Promo Pack) [Core Set 2021 Promos]Set: Core Set 2021 Promos Type: Creature Human Rogue Rarity: Rare Cost: {B} Flash Whenever Thieves' Guild Enforcer or another Rogue enters the battlefield under your control, each opponent mills two cards. As long as an opponent has eight or more cards in their graveyard, Thieves' Guild Enforcer gets +2 +1 and has deathtouch.

They only specify the consequences should you fail

Set: XY: Generations Type: Basic Metal Energy Rarity: Common

Each player except that creature's controller creates a token that's a copy of that creature

Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn

Set: Onslaught Type: Creature — Elemental Cat Rarity: Rare Cost: {1}{R}{R}{R} Trample

Set: World Championship Decks 2001 Type: Instant Rarity: Uncommon Cost: {3}{R} Destroy all Islands

Tap three untapped white creatures you control: Destroy target creature

it enters the battlefield with five +1/+1 counters on it

Set: Urza's Saga Type: Artifact Rarity: Rare Cost: {4} As Phyrexian Processor enters the battlefield

Set: Commander Anthology Type: Creature — Insect Spirit Rarity: Rare Cost: {2}{G} Trample

"Once I dreamt of death

Set: Ravnica Allegiance Guild Kit Type: Creature — Nightmare Horse Rarity: Rare Cost: {4}{B}{R} First strike