MURMUR

Swarm weight slows you down.
0 nearby = 100% speed (lone wolf) · 1–10 = 90% · 11–49 = 80% (can't consume Icos)
50–99 = 70% (operational) · 100+ = 50% (dense and powerful, tightest grip)

Solo Iode (0 nearby): Pulse pushes but can't kill.
Surge does no collision damage — except a direct Iode-vs-Iode strike
destroys 10 enemy particles. IODE STRIKE!

Desperation mode: Below 100 particles your swarm glows
and ability cooldowns are halved. Use the speed to recover.

Capture Icos (need ≥ 50 particles). Eliminate the enemy Home Ico to win.
Particles at the arena edge die after 2 seconds. The arena shrinks twice.