Cheapest priced copy (Commander 2016): $0.69 at Card Kingdom, near mint, their price list as of .
Charging Cinderhorn 
Creature — Elemental Ox · 4/2 · Rare · Commander 2016 · #16
Haste
At the beginning of each player's end step, if no creatures attacked this turn, put a fury counter on this creature. Then this creature deals damage equal to the number of fury counters on it to that player.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.69 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 16 | Rare | $0.69 | — |
4 rulings from Wizards of the Coast
- 8 November 2016If a player loses the game during that player’s own turn, the turn continues to completion. If no creatures attacked, Charging Cinderhorn will get a fury counter even though it won’t deal damage to any player.
- 8 November 2016Charging Cinderhorn’s triggered ability doesn’t trigger at all if a creature attacked this turn. It won’t get a fury counter or deal damage.
- 8 November 2016If Charging Cinderhorn leaves the battlefield in response to its triggered ability, it won’t get a new fury counter, but it will deal damage equal to the number of fury counters it had before leaving the battlefield.
- 8 November 2016Charging Cinderhorn’s triggered ability triggers at the beginning of each player’s end step if no creatures attacked, including yours, and even if it wasn’t on the battlefield during combat.