The Gamigin steed can be found
on the first Island in the Dead Lands biome. You can only unlock it by paying a gem. Gems are only found on Islands 2-5, so to get the steed you'll need to do the following:
- build the boat and escape the first island
- on the second island, look for a treasure chest with gems and collect at least one
- build the boat and sail back to the first island (press
once the boat departs and select the leftmost island - you should see a greyed out shape of a horse on the map, that's the steed)
- back on the first island,
find the stone statue of a woman and
pay one (1) gem to unlock the steed
- pay three (3) coins to select is as your mount and
ride it to unlock the achievement