Quilled GreatwurmHow it works & interactions with other cards

Unpacking the Combat Growth

The primary ability of Quilled Greatwurm triggers whenever a creature you control deals combat damage to a player or a planeswalker during your turn. It counts the total damage dealt and places that many +1/+1 counters on the attacking creature. Crucially, the creature must survive the combat encounter to receive these counters; if it trades with a blocker or is destroyed by a spell before the trigger resolves, no counters are placed.

Rising from the Grave

The final ability allows you to cast Quilled Greatwurm from your graveyard. To do this, you must pay its mana cost of 4GG and also perform an additional cost: removing six counters from among creatures you control. These six counters can be taken from a single creature or spread across several. Note that you still follow normal timing rules, meaning you can only cast it during your main phase when the stack is empty.

Strategic Deployment

Because this Wurm triggers on any combat damage, creatures with Trample or Evasion are its best friends. Even if a creature is blocked, any excess damage that spills over to the player will result in +1/+1 counters. This creates a snowball effect where your board state becomes mathematically impossible for opponents to block effectively over multiple turns.

Interaction examples

Scaling the Plant Army

Avenger of Zendikar

After you play Avenger of Zendikar and generate several Plant tokens, you play a land to put a +1/+1 counter on each. When you attack with those Plants while Quilled Greatwurm is on the battlefield, every Plant that deals damage will double its power by gaining counters equal to the damage dealt. If you later lose the Wurm to a board wipe, you can easily remove six of those new counters from your surviving Plants to cast the Wurm again from your graveyard.

The Survival Requirement

You attack with a 2/2 creature, and your opponent blocks with their own 2/2. Both creatures deal 2 damage to each other and are destroyed. Because the creature did not survive the combat phase, the Quilled Greatwurm's trigger has no creature to put counters on, and the ability fails to provide a benefit.

Resource Management with Untap Effects

Seedborn Muse

While Seedborn Muse untaps your permanents every turn, remember that Quilled Greatwurm's growth ability only triggers during *your* turn. Even if you find a way to attack on an opponent's turn, the Wurm will not grant +1/+1 counters. However, Seedborn Muse ensures you always have the mana available to cast the Wurm from your graveyard the moment your main phase begins.