VOLCANO TO 1300CE BLACK DTH

 A

Bet 😄 BGT-style, ultra-clean:

🌋 ERUPTION
   ↓
🌫 ATMOSPHERIC HAZE
   ↓
❄️ CLIMATE SHIFTS
   ↓
🌾 FAMINE + STRESS
   ↓
🐀 RODENTS MOVE
   ↓
🪳 FLEAS FOLLOW
   ↓
🧍 HUMANS EXPOSED
   ↓
🦠 PLAGUE SPREADS
   ↓
🚢 TRADE BOOSTS IT
   ↓
☠️ BLACK DEATH

Tagline:
Volcano = buff to the chaos, not the main villain.