2023-06-16 Some cards refer to the "amassed Army." That means the Army creature you chose to receive counters, even if no counters were placed on it for some reason.
Amzu, Swarms Hunger Amzu, Swarm's Hunger is a good insect lord as a menace enabler, and it synergizes well with what many Golgari insect decks want to do with its trigger when cards leave your graveyard
This ability is pretty good in its own right, as moving a counter to a creature that is best at using it can allow your turns to go much more smoothly
If I was to build her, Id want some more expensive additions to the manabase and ramp package, like Ancient Tomb, Smothering Tithe and even maybe a cheeky Mana Crypt or Jeweled Lotus

Choose from three fierce Commanders from Ikoria Lair of Behemoths (IKO) to lead your deck to victoryfour legendary creatures including two that share a magical bond and can command your deck together Commander is a Magic The Gathering (MTG) multiplayer format where alliances are formed friends are betrayed and grudges are repaid with a vengeance The Symbiotic Swarm deck leverages your creatures many abilitiesgive your living creatures the abilities in your graveyard with Kathril Aspect Warper reanimate a swarm of small creatures with Tayam Luminous Enigma and draw cards when your buffed creatures leave the battlefield with Nikara Lair Scavenger and Yannik Scavenging Sentinel Symbiotic Swarm is one of five Commander Decks from Ikoria Lair of Behemoths (IKO) Each includes exclusive cards tailored to that deckpick your favorite mechanics and dive in to battle
Overall, there are a total of around 10-11 spells that bring things back from the graveyard