Corpsejack MenaceHow it works & interactions with other cards

Doubling Down on Growth

Corpsejack Menace features a replacement effect that watches for any instance where a creature you control would receive +1/+1 counters. Whether a spell adds them, an ability places them, or a creature enters the battlefield with them, the Menace intervenes. Instead of the original amount, you place exactly twice that many counters on the creature.

Step-by-Step Resolution

When an event occurs that would put +1/+1 counters on a creature, the game checks for replacement effects before the counters are actually placed. First, identify the source of the counters (such as a spell or an 'enters the battlefield' ability). Second, if you control Corpsejack Menace, the effect modifies the event by doubling the number. Finally, the counters are placed on the creature as a single event. If you control multiple copies of Corpsejack Menace, each one applies its doubling effect sequentially, leading to exponential growth (4x, 8x, and so on).

Common Misconceptions

A common mistake is thinking this card works with any type of counter; it specifically only affects +1/+1 counters. It will not double loyalty counters on planeswalkers or charge counters on artifacts. Additionally, because it is a replacement effect, it does not use the stack itself; the doubling happens automatically as the original effect resolves.

When to Deploy

To maximize value, you should play Corpsejack Menace before resolving spells that distribute many counters. Since it also affects creatures entering the battlefield with counters, having it on the board early ensures your subsequent creatures arrive much larger than usual. It is a 'must-answer' threat that forces opponents to use removal before your board state becomes insurmountable.

Interaction examples

Normal Battlefield Presence

If you play a spell that says 'Put two +1/+1 counters on target creature,' and you control Corpsejack Menace, that creature will receive four +1/+1 counters instead. This happens as the spell resolves, with no additional opportunity for players to respond between the doubling and the placement.

Interaction with Value Creatures

Solemn SimulacrumEternal Witness

If you use an external effect (like a spell or another creature's ability) to put a +1/+1 counter on Solemn Simulacrum or Eternal Witness while Corpsejack Menace is on the battlefield, those creatures will each receive two counters instead of one. While these creatures don't naturally enter with counters, Corpsejack Menace ensures that any support spells you use to keep your utility creatures alive are twice as effective.