Morik wades forward in the channel of sludge, nearly trips on a bloated corpse, and manages to overcome his revulsion at the cloud of foul gas that jets forth as the corpse bursts. Swinging his shillelagh single-mindedly, he continues smashing centipedes. Swarm1 takes 12 damage.
Elowin, Eozindra, Ishi, and Elysia shudder with revulsion at the smell, but do not succumb to nausea. The unbreathing Steel Defender is not affected. Adran, focused on the rust monster trying to crumble and eat his armor, is not so lucky.
Adran is POISONED.
At the end of his turn, Morik gains 8 temporary HP.
The few remaining centipedes still crawling on Ishi - Swarm1 - attack the raging barbarian. But he ignores their stings and takes no damage.
Despite the gorge rising in his throat, Adran looses his crossbow at the rust monster: the magic bolt sinks into its carapace (Rust Monster takes 11 damage). The artificer stays protectively between the metal eater and his Steel Defender.
At the end of his turn, Adran gains 8 temporary HP.
The Steel Defender does nothing on its turn.
Not even able to notice nausea in his frenzy, Ishi attacks with his war hatchet, hacking and slashing. The last few centipedes are exterminated. Swarm1 is destroyed.
At the end of his turn, Ishi gains 8 temporary HP.
The centipedes that were crawling on and stinging Elysia (Swarm2) are clearly just trying to get to the rust monster's latest victim. Swarm2 surges forward one square into Eozindra's space and attacks the bard. But their little forcipules aren't really into it, and Eozindra takes no damage.
Gritting her teeth against the stench, Eozindra whimpers in fear at the prospect of a life without her sister. She casts Healing Word on Elysia (Elysia regains 5 HP). Then the bard attacks, hitting the centipedes with a crit (Swarm2 takes 10 damage).
At the end of her turn, Eozindra gains 8 temporary HP.
For her part, the adrenalin and horror of being swarmed by bugs overwhelms any nausea Elysia might feel. The rogue slashes and stabs with her rapier, picking off the Swarm2 centipedes that are now crawling on her sister (Swarm2 takes 10 damage).
At the end of her turn, Elysia gains 8 temporary HP.
Encouraged by the initial taste of sweet, sweet steel, the Rust Monster attempts to feed on Adran's armor some more. But the artificer keeps his distance, avoiding the feelers so that his armor does not degrade further.
22- Elowin (24/24) 8 TEMP HP
16 - Morik (33/33) 8 TEMP HP
16 - Swarm1
15 - Adran (26/26) 1: 3/3 POISONED, 8 TEMP HP
11 - Ishi (35/35) FRENZIED, ENRAGED, 8 TEMP HP
10 - Swarm2 BANE, Faerie fire
9 - Eozindra (15/15) 8 TEMP HP
5 - Elysia (6/24) 8 TEMP HP
5 - Rust Monster BANE, Faerie Fire
Rolls
Ishi CON Save DC12 - (1d20+5)
(13) + 5 = 18
Swarm1 attack on Ishi AC16, piercing damage - (1d20+3-1d4, 2d4)
1d20+3-1d4 : (12) - (3) + 3 = 12
2d4 : (22) = 4
Swarm1 possible ADV on Ishi AC16 - (1d20-1d4+3)
(3) - (2) + 3 = 4
Swarm2 attacks Eozindra AC13 - (1d20-1d4+3, 4d4)
1d20-1d4+3 : (5) - (4) + 3 = 4
4d4 : (3243) = 12
Adding crit damage to Eozindra's rapier attack (piercing) - (7+1d8)
(3) + 7 = 10
Adran's DEX save DC11 - (1d20+4)
(13) + 4 = 17