
It's clear that Symbiotic Swarm is a Keyword Soup deck that uses its graveyard to help fuel its Keyword strategy and give it lategame punching power.

There's also a decent amount of overlap between these two themes, with at least 8 cards that care about both keywords and your graveyard. I also count 26 cards that deal with keywords, either granting keywords to your creatures ( Avenging Huntbonder) or are keyword soup creatures that other cards will use as fuel ( Akroma, Angel of Wrath). I count 17 cards that deal with your graveyard, either milling yourself ( Satyr Wayfinder) or interacting with cards in your graveyard ( Unburial Rites). Out of the box, Symbiotic Swarm is a solid creature-focused deck that does a good job supporting both Graveyard and Keyword strategies. If you like where this deck is going, then great! Let's check out the preconstructed list:


These keyword soup creatures in our graveyard are then used as fuel for various payoff cards ( Soulflayer). The deck runs plenty of creatures that are loaded with keywords ( Vampire Nighthawk) or grant keyword counters ( Void Beckoner), by casting them or milling them into our graveyard ( Satyr Wayfinder). We've cycled through Timeless Wisdom, forked all the spells in Arcane Maelstrom, sacrificed our Humans to Ruthless Regiment, mutated all the creatures in Enhanced Evolution, and now we're covering the fifth and final precon from the set: Symbiotic Swarm, a grindy Keyword Soup Abzan deck that uses its graveyard to fuel our Keyword Soup strategy.
