Step 1: 💧 Water and 🌍 Earth

Combine 💧 Water and 🌍 Earth to create 🌱 Plant

Step 2: 💧 Water and 🌬️ Wind

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

Step 3: 💧 Water and 💧 Water

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

Step 4: 🌍 Earth and 🌬️ Wind

Now, combine 🌍 Earth and 🌬️ Wind to create 🌫️ Dust

Step 5: 🔥 Fire and 🔥 Fire

And then, combine 🔥 Fire and 🔥 Fire to create 🌋 Volcano

Step 6: 🌊 Wave and 🌱 Plant

As next step, combine 🌊 Wave and 🌱 Plant to create 🌊 Seaweed

Step 7: 💨 Steam and 🔥 Fire

Combine 💨 Steam and 🔥 Fire to create 🚗 Engine

Step 8: 💧 Water and 🔥 Fire

Combine 💧 Water and 🔥 Fire to create 💨 Steam

Step 9: 🌊 Wave and 🌊 Lake

Combine 🌊 Wave and 🌊 Lake to create 🌊 Tsunami

Step 10: 🌊 Lake and 🌊 Lake

Combine 🌊 Lake and 🌊 Lake to create 🌊 Ocean

Step 11: 🌋 Volcano and 🌫️ Dust

Combine 🌋 Volcano and 🌫️ Dust to create 🌋 Ash

Step 12: 🌊 Seaweed and 💨 Steam

Combine 🌊 Seaweed and 💨 Steam to create 🍣 Sushi

Step 13: 🚗 Engine and 🚗 Engine

Combine 🚗 Engine and 🚗 Engine to create 🚀 Rocket

Step 14: 🌊 Tsunami and 💨 Steam

Combine 🌊 Tsunami and 💨 Steam to create 🚢 Titanic

Step 15: 🌋 Ash and 🌊 Ocean

Combine 🌋 Ash and 🌊 Ocean to create 🧂 Salt

Step 16: 🚀 Rocket and 🍣 Sushi

Combine 🚀 Rocket and 🍣 Sushi to create 🍣 Space Sushi

Step 17: 🧂 Salt and 🚢 Titanic

Combine 🧂 Salt and 🚢 Titanic to create 🚿 Sink

Step 18: 🚿 Sink and 🍣 Space Sushi

Combine 🚿 Sink and 🍣 Space Sushi to create 🚀🌌 Space Sink