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: 💧 Water and 🔥 Fire

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

Step 4: 💧 Water and 🌍 Earth

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

Step 5: 🌬️ Wind and 🌬️ Wind

And then, combine 🌬️ Wind and 🌬️ Wind to create 🌪️ Tornado

Step 6: 💨 Steam and 🌬️ Wind

As next step, combine 💨 Steam and 🌬️ Wind to create ☁️ Cloud

Step 7: 🏔️ Mountain and 🌊 Lake

Combine 🏔️ Mountain and 🌊 Lake to create 🏞️ Fjord

Step 8: 🌊 Wave and 🌱 Plant

Combine 🌊 Wave and 🌱 Plant to create 🌊 Seaweed

Step 9: 💨 Steam and 🔥 Fire

Combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 10: 🌱 Plant and 🌱 Plant

Combine 🌱 Plant and 🌱 Plant to create 🌳 Tree

Step 11: 🌪️ Tornado and 🌪️ Tornado

Combine 🌪️ Tornado and 🌪️ Tornado to create 🌀 Hurricane

Step 12: 🌍 Earth and 🌍 Earth

Combine 🌍 Earth and 🌍 Earth to create 🏔️ Mountain

Step 13: 🏞️ Fjord and ☁️ Cloud

Combine 🏞️ Fjord and ☁️ Cloud to create 🌈 Rainbow

Step 14: 🚗 Engine and 🌊 Seaweed

Combine 🚗 Engine and 🌊 Seaweed to create 🚤 Submarine

Step 15: 🌀 Hurricane and 🌳 Tree

Combine 🌀 Hurricane and 🌳 Tree to create 🌴 Palm

Step 16: 🌈 Rainbow and 🏔️ Mountain

Combine 🌈 Rainbow and 🏔️ Mountain to create 🦄 Unicorn

Step 17: 🌴 Palm and 🚤 Submarine

Combine 🌴 Palm and 🚤 Submarine to create 🌴 Palm Sub

Step 18: 🌴 Palm Sub and 🦄 Unicorn

Combine 🌴 Palm Sub and 🦄 Unicorn to create 🦄 Palm Unicorn