Green Whistle

Green Whistle is a very rare active trinket that summons a Leg onto the battlefield when blown. Whatever the Leg does in combat, having a very rare trinket dedicated to calling it suggests it's a meaningful unit or effect. Its ability name (tk_LegWhistle) implies this is a specific creature or body-part entity with unique combat properties — a quirky but potentially powerful summon.

The Leg as a summoned entity fits the surreal Mewgenics aesthetic: disembodied body parts as combat units are a recurring theme in the game. At very rare rarity the Leg is presumably a powerful summon with good HP, damage output, or special abilities such as kicking multiple targets, stomping for area damage, or applying movement-related debuffs. Unlike SpawnOnBattleStart trinkets, an active whistle means you control exactly when the Leg enters the fight, giving you timing flexibility to drop it at the most advantageous moment.

Green Whistle suits builds that want a powerful burst summon at a critical moment rather than a passive companion every fight. Summon the Leg when facing a boss or elite encounter where the extra body's damage and distraction can swing the fight. If the whistle is single-use, treat it as a trump card for a specific encounter. If it has multiple charges, budget them across the hardest fights on the run. Summon-amplifying mutations apply to the Leg if the game counts it as a summoned entity, potentially boosting it into a legitimate heavy hitter.