Mycelium

Raphaniel breathes the spores of a fungus creature and links with its mind RW E4·02:24:45. Through the link the creature speaks of the mycelium RW E4·02:26:37. Matt says the heart of the mycelium is the Heart of Saprophus RW E4·02:26:45.

In episode 5 the mycelium is a blue glowing network that fills the cavern like a starscape and pulses RW E5·00:54:21 RW E5·02:07:10. In episode 6 Matt calls it a singular being RW E6·00:01:42. Raphaniel refuses the Archbishop's offer and dives into the mycelium RW E6·00:41:24. He communes with the heart, persuades it, and unlocks its lair actions RW E6·01:01:33 RW E6·01:04:16. His final speech begins "I've connected to the first place that ever felt like home." RW E6·01:42:03. He sinks into the teeth asking that his body serve "the only warmth I have ever known" RW E6·01:42:29.

After the Avatar is destroyed, Deli touches the glowing line for the second time and the mycelium withdraws RW E6·01:51:12 RW E6·01:51:23. Through the link Matt shows the Saprophians rising against the remaining architects, torn apart to maintain their silence, and the mycelium asks whether the party can keep a secret RW E6·01:52:58 RW E6·01:53:52. Deli, Amangeaux and Colin agree to keep it RW E6·01:53:52 RW E6·01:55:01 RW E6·01:56:13.