Terrus Wurm 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
Scavenge(
, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)
Complete guide
Meet Terrus Wurm, a massive Zombie Wurm from the Golgari Swarm that proves death is only the beginning. This creature is a double threat, serving as a late-game powerhouse on the battlefield and a potent buff from your graveyard via the Scavenge mechanic.
Understanding Scavenge
Terrus Wurm features the Scavenge keyword, which allows you to exile it from your graveyard to empower another creature. The number of +1/+1 counters placed on the target is equal to Terrus Wurm's power at the moment it left the graveyard. Because its base power is 5, you will typically be placing five +1/+1 counters on your chosen target.
Step-by-Step Resolution
To use Scavenge, Terrus Wurm must be in your graveyard during one of your main phases while the stack is empty. First, pay the cost of {6}{B} and exile Terrus Wurm from your graveyard. Second, choose a target creature you control. Once the ability resolves, the target creature receives the +1/+1 counters. Note that exiling the card is part of the cost; your opponents cannot respond by removing the card from your graveyard once you have announced the activation.
Common Pitfalls
The most common mistake is forgetting that Scavenge can only be activated as a sorcery. You cannot use this ability during an opponent's turn or in response to a spell. Additionally, if the target creature leaves the battlefield or becomes an illegal target before the Scavenge ability resolves, the ability fails and you do not get the counters, though Terrus Wurm remains exiled.
Interaction examples
If you have Massacre Wurm on the battlefield and Terrus Wurm in your graveyard, you can activate Scavenge targeting Massacre Wurm. After the ability resolves, your 6/5 Massacre Wurm becomes a massive 11/10 threat, making it significantly harder for your opponent to block or destroy through combat.
With Sheoldred, Whispering One, you face a strategic choice. During your upkeep, Sheoldred can return Terrus Wurm from the graveyard to the battlefield for free. However, if you need to boost Sheoldred's survivability against high-power attackers, you can instead wait for your main phase to Scavenge Terrus Wurm onto Sheoldred, turning the 6/6 Praetor into an 11/11 behemoth.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Terrus Wurm
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Exiling the creature card with scavenge is part of the cost of activating the scavenge ability. Once the ability is activated and the cost is paid, it’s too late to stop the ability from being activated by trying to remove the creature card from the graveyard.
No other card is named in this ruling.
Legal formats
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Meta decks with Terrus Wurm
No archived Top 8 deck with this card yet.



Massacre Wurm
Sheoldred, Whispering One