Archfiend of the Dross — ruling 1

If Archfiend of the Dross somehow loses all of its oil counters due to an effect other than its upkeep triggered ability, this won't cause you to lose the game until the next time that ability resolves.

Archfiend of the Dross — ruling 2

If Archfiend of the Dross is no longer on the battlefield as its upkeep triggered ability resolves, use the number of oil counters it had the last time it existed on the battlefield to determine whether you lose the game. You can't remove oil counters from it if it's not on the battlefield, so you won't lose the game if it had only one oil counter on it before leaving the battlefield.

Archfiend of the Dross : règles, fonctionnement et interactions (MTG)

Archfiend of the Dross is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Flying This creature enters with four oil counters on it. At the beginning of your upkeep, remove an oil counter from this creature. Then if it has no oil counters on it, you lose the game. Whenever a creature an opponent controls dies, its controller loses 2 life.

Complete guide

Archfiend of the Dross combines flying with a life-loss trigger that punishes opponents when their creatures die. Its four oil counters also create a deadline: if its upkeep ability resolves and finds no oil counters remaining, you lose the game.

What it does

For {2}{B}{B}, you get a Phyrexian Demon with flying that enters with four oil counters. Entering with those counters is not a triggered ability; they are already on it when it arrives on the battlefield. At the beginning of your upkeep, its ability triggers. When that ability resolves, you remove one oil counter, then check whether it has none left. With no other changes, the fourth resolution of this ability removes the last counter and makes you lose the game. Its final ability triggers whenever a creature an opponent controls dies—that is, moves from the battlefield to a graveyard. On resolution, that creature’s controller loses 2 life. This is life loss, not damage.

How its abilities resolve: two interaction examples

Example 1 — An opponent’s Solemn Simulacrum dies: 1. You control Archfiend of the Dross, and your opponent controls Solemn Simulacrum. 2. Solemn Simulacrum dies. Its optional card-draw ability and your Archfiend’s life-loss ability both trigger. 3. The active player puts their triggers on the stack first, followed by the other players in turn order. The triggers on top resolve first. In a two-player game on your turn, your opponent’s draw trigger therefore resolves before your life-loss trigger; on their turn, the order is reversed. 4. Assuming both abilities resolve, your opponent may draw a card and loses 2 life. Declining the draw does not prevent the life loss. Example 2 — Roaming Throne chooses Demon: 1. You control Archfiend of the Dross with four oil counters, then have Roaming Throne enter and choose Demon. 2. At your next upkeep, Archfiend’s upkeep ability triggers an additional time because of Roaming Throne. The two abilities resolve separately, reducing its counters from four to three, then from three to two. 3. At your following upkeep, the same thing happens: one resolution reduces the counters to one, and the next removes the final counter and makes you lose the game, assuming nothing changes in between. 4. Roaming Throne also makes Archfiend’s creature-death ability trigger an additional time. If an opponent’s Solemn Simulacrum dies while you control both, that opponent faces two separate 2-life losses. Solemn Simulacrum’s own draw trigger is not doubled by your Roaming Throne.

Common mistakes: zero counters and leaving the battlefield

Having zero oil counters does not itself make you lose immediately. You lose when Archfiend’s upkeep ability resolves and its check finds no counters. If it already has zero, failing to remove a counter does not skip the subsequent check. You can respond to the upkeep trigger, but you cannot act between removing the counter and checking the counter total: those instructions are part of one resolution. Example 3 — Archfiend leaves with one counter: 1. Archfiend begins your upkeep with one oil counter, and its upkeep ability goes on the stack. 2. Before that ability resolves, Archfiend leaves the battlefield. 3. The ability still resolves, but it cannot remove a counter from the departed creature. It uses the number of oil counters Archfiend had immediately before leaving—one—so you do not lose the game from that resolution. Leaving the battlefield is not an unconditional escape: if Archfiend had zero oil counters immediately before leaving, the resolving ability uses that information and makes you lose.

When to play it

Play Archfiend when its flying and the life loss from opposing creatures dying can matter before its oil-counter deadline. Its final ability does not require Archfiend to kill those creatures itself, so any opposing creature that dies while it is on the battlefield can trigger it. Track your upcoming upkeep resolutions carefully rather than treating the counters as a guaranteed four-turn window. Roaming Throne offers additional life-loss triggers, but it also accelerates the dangerous upkeep ability. Before pairing them, account for both halves of that interaction.

Guide written with AI from the official text and rulings. Official English text prevails.

How it works : Archfiend of the Dross

Original English text — Wizards of the Coast / Scryfall

#1February 4, 2023· Wizards of the Coast
If Archfiend of the Dross somehow loses all of its oil counters due to an effect other than its upkeep triggered ability, this won't cause you to lose the game until the next time that ability resolves.
No other card is named in this ruling.
#2February 4, 2023· Wizards of the Coast
If Archfiend of the Dross is no longer on the battlefield as its upkeep triggered ability resolves, use the number of oil counters it had the last time it existed on the battlefield to determine whether you lose the game. You can't remove oil counters from it if it's not on the battlefield, so you won't lose the game if it had only one oil counter on it before leaving the battlefield.
No other card is named in this ruling.