Parous Worm

A slow-breeding worm worn as a trinket that triggers a status effect at the conclusion of every battle. Parous Worm costs CON -1 and doesn't contribute anything during fights themselves, but the StatusOnBattleEnd fires consistently after every encounter — potentially building stacks, applying a buff between fights, or inflicting a lasting debuff on the host over time. Best evaluated based on what the specific status does: a beneficial end-of-battle effect makes this worthwhile, while a harmful one demands careful consideration.

StatusOnBattleEnd effects in Mewgenics can range from stat buffs or debuffs to disease application, permanent stat changes, or item spawns. The consistent post-battle firing means the effect accumulates across the entire run — for beneficial effects this creates compounding advantages, while negative effects can slowly degrade the wearer. The CON -1 is the only in-combat cost, so during fights themselves the worm is simply a slight HP reduction with no other combat presence.

If the Parous Worm's post-battle status is beneficial — such as a small stat increase, HP regen, or a spawned item — it's a strong passive income piece that pays dividends over a long run. Check the in-game tooltip or current run context to identify what status it applies before committing the trinket slot. On a run with many fights ahead, even a small per-battle benefit accumulates meaningfully.