Cheapest priced copy (Commander 2017): $0.49 at Card Kingdom, near mint, their price list as of .
Crimson Honor Guard 
Creature — Vampire Knight · 4/5 · Rare · Crimson Vow Commander · #145
Trample
At the beginning of each player's end step, this creature deals 4 damage to that player unless they control a commander.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2017 | 23 | Rare | $0.49 | — |
| Crimson Vow Commander | 145 | Rare | $0.49 | — |
3 rulings from Wizards of the Coast
- 25 August 2017Crimson Honor Guard's last ability triggers at the beginning of each player's end step whether that player controls a commander or not. Whether that player controls a commander is checked only as the ability resolves.
- 25 August 2017The player could control any player's commander to satisfy Crimson Honor Guard's ability. If a player gains control of another player's commander “until end of turn,” the player who gained control of it will still control that commander during the end step.
- 25 August 2017Crimson Honor Guard will deal 4 damage to you, too, if you don't control a commander.