Step 1: 💧 Water and 💧 Water

Combine 💧 Water and 💧 Water to create 🌊 Lake

Step 2: 💧 Water and 🌬️ Wind

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

Step 3: 🌍 Earth and 🌍 Earth

Then, combine 🌍 Earth and 🌍 Earth to create 🏔️ Mountain

Step 4: 💧 Water and 🔥 Fire

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

Step 5: 🏔️ Mountain and 🌊 Lake

And then, combine 🏔️ Mountain and 🌊 Lake to create 🏞️ Fjord

Step 6: 💨 Steam and 🔥 Fire

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

Step 7: 🌬️ Wind and 🔥 Fire

Combine 🌬️ Wind and 🔥 Fire to create 💨 Smoke

Step 8: 💨 Smoke and 🌊 Wave

Combine 💨 Smoke and 🌊 Wave to create 🏄 Surf

Step 9: 🏔️ Mountain and 🏔️ Mountain

Combine 🏔️ Mountain and 🏔️ Mountain to create 🏔️ Mountain Range

Step 10: 🏞️ Fjord and 💨 Steam

Combine 🏞️ Fjord and 💨 Steam to create 🛳️ Steamboat

Step 11: 🚗 Engine and 🚗 Engine

Combine 🚗 Engine and 🚗 Engine to create 🚀 Rocket

Step 12: 🏄 Surf and 💨 Smoke

Combine 🏄 Surf and 💨 Smoke to create 🏄 Surfer

Step 13: 🛳️ Steamboat and 🏔️ Mountain Range

Combine 🛳️ Steamboat and 🏔️ Mountain Range to create 🌊 Mississippi

Step 14: 🏄 Surfer and 🚀 Rocket

Combine 🏄 Surfer and 🚀 Rocket to create 🤖 Iron Man

Step 15: 🤖 Iron Man and 🌊 Mississippi

Combine 🤖 Iron Man and 🌊 Mississippi to create 🚢 Iron Mississippi