WORM — self-replicates with no user action. Minis copy themselves every few seconds (capped); left alive 10s they mutate and start hopping at you. Contain fast.
HEAVYWORM — leaves corrupted slow-trails and bursts into 4 minis when killed. Sometimes containment has side effects — plan the takedown.
FIREWALL — hold L to filter frontal attacks; each blocked hit costs power. If it hits zero it goes OFFLINE and must fully reboot (~15s) — unless you deploy a patch. No single control lasts forever.
MFA — a second factor fights beside you: your clone mirrors every attack on your blind side, and if you're hit, the clone takes it instead (and is spent). Layers win.
ENCRYPTION — the boss gate needs all 3 keys. The boss itself carries an encrypted shield: collect all 10 password fragments to break it, or fight it at half damage.