Leviathan

Overview
Leviathans are powerful aquatic creatures with great health and strength. The problem is it's hard to get them in position to optimise their attacks, with the combination of charge, cleave and push. It's easy for friendly units to get caught up in a leviathan's attacks.

Moneymaking
They're the 2nd best creature to sell. They can be sold for 500 gold at Medium size and for 1500 gold at Enormous size. Every level above 1 additionally increases their price by 5%.

Trivia

 * There is an unique Leviathan named Bubbles.