Step 1: 💧 Water and 🌍 Earth

Combine 💧 Water and 🌍 Earth to create 🌱 Plant

Step 2: 💧 Water and 🔥 Fire

Next, combine 💧 Water and 🔥 Fire to create 💨 Steam

Step 3: 💧 Water and 💧 Water

Then, combine 💧 Water and 💧 Water to create 🌊 Lake

Step 4: 💧 Water and 🌬️ Wind

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

Step 5: 🌱 Plant and 🌱 Plant

And then, combine 🌱 Plant and 🌱 Plant to create 🌳 Tree

Step 6: 🌱 Plant and 🌬️ Wind

As next step, combine 🌱 Plant and 🌬️ Wind to create 🌼 Dandelion

Step 7: 💨 Steam and 🔥 Fire

Combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 8: 🌬️ Wind and 🌬️ Wind

Combine 🌬️ Wind and 🌬️ Wind to create 🌪️ Tornado

Step 9: 🌊 Wave and 🌊 Lake

Combine 🌊 Wave and 🌊 Lake to create 🌊 Tsunami

Step 10: 🌬️ Wind and 🔥 Fire

Combine 🌬️ Wind and 🔥 Fire to create 💨 Smoke

Step 11: 💨 Smoke and 🌊 Wave

Combine 💨 Smoke and 🌊 Wave to create 🏄 Surf

Step 12: 🌳 Tree and 💧 Water

Combine 🌳 Tree and 💧 Water to create 🌊 River

Step 13: 🚗 Engine and 🌼 Dandelion

Combine 🚗 Engine and 🌼 Dandelion to create 🚁 Helicopter

Step 14: 🌊 Tsunami and 🌪️ Tornado

Combine 🌊 Tsunami and 🌪️ Tornado to create 💥 Destruction

Step 15: 🏄 Surf and 💨 Smoke

Combine 🏄 Surf and 💨 Smoke to create 🏄 Surfer

Step 16: 🚁 Helicopter and 🌊 River

Combine 🚁 Helicopter and 🌊 River to create 🚁 Amphibious Helicopter

Step 17: 🏄 Surfer and 💥 Destruction

Combine 🏄 Surfer and 💥 Destruction to create 💚 Hulk

Step 18: 💚 Hulk and 🚁 Amphibious Helicopter

Combine 💚 Hulk and 🚁 Amphibious Helicopter to create 💪🚁 Hulk-o-copter