Cheapest priced copy (Ravnica: Clue Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Undercover Butler 
Creature — Human Rogue · 2/3 · Uncommon · Ravnica: Clue Edition · #49
Whenever this creature attacks the player with the most life or tied for most life, it can't be blocked this turn.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ravnica: Clue Edition | 49 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 2 February 2024Once Undercover Butler's ability triggers, it doesn't matter what happens to players' life totals before the ability resolves. Undercover Butler won't be able to be blocked this turn even if the defending player doesn't have the most life and isn't tied for most life as the ability resolves.
- 2 February 2024Undercover Butler's ability doesn't trigger if it attacks a planeswalker or battle, no matter what the life total of the planeswalker's controller or battle's protector is.