Step 1: 💧 Water and 🔥 Fire

Combine 💧 Water and 🔥 Fire to create 💨 Steam

Step 2: 🔥 Fire and 🔥 Fire

Next, combine 🔥 Fire and 🔥 Fire to create 🌋 Volcano

Step 3: 💧 Water and 🌬️ Wind

Then, combine 💧 Water and 🌬️ Wind to create 🌊 Wave

Step 4: 💧 Water and 🌍 Earth

Now, combine 💧 Water and 🌍 Earth to create 🌱 Plant

Step 5: 🌱 Plant and 🌬️ Wind

And then, combine 🌱 Plant and 🌬️ Wind to create 🌼 Dandelion

Step 6: 💨 Steam and 🔥 Fire

As next step, combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 7: 🌋 Volcano and 🌫️ Dust

Combine 🌋 Volcano and 🌫️ Dust to create 🌋 Ash

Step 8: 🌊 Wave and 🌱 Plant

Combine 🌊 Wave and 🌱 Plant to create 🌊 Seaweed

Step 9: 🌫️ Dust and 💧 Water

Combine 🌫️ Dust and 💧 Water to create 💩 Mud

Step 10: 🌍 Earth and 🌬️ Wind

Combine 🌍 Earth and 🌬️ Wind to create 🌫️ Dust

Step 11: 🌫️ Dust and 🌱 Plant

Combine 🌫️ Dust and 🌱 Plant to create 🌱 Pollen

Step 12: 🚗 Engine and 🌼 Dandelion

Combine 🚗 Engine and 🌼 Dandelion to create 🚁 Helicopter

Step 13: 🌋 Ash and 🌫️ Dust

Combine 🌋 Ash and 🌫️ Dust to create 🌋 Cinder

Step 14: 💩 Mud and 🌊 Seaweed

Combine 💩 Mud and 🌊 Seaweed to create 🌿 Mudweed

Step 15: 🌱 Pollen and 🌫️ Dust

Combine 🌱 Pollen and 🌫️ Dust to create 🤧 Allergy

Step 16: 🌋 Cinder and 🚁 Helicopter

Combine 🌋 Cinder and 🚁 Helicopter to create 🚒 Firefighter

Step 17: 🤧 Allergy and 🌿 Mudweed

Combine 🤧 Allergy and 🌿 Mudweed to create 🌼 Sneezeweed

Step 18: 🌼 Sneezeweed and 🚒 Firefighter

Combine 🌼 Sneezeweed and 🚒 Firefighter to create 🌼 Fireweed