Iceland - area in ninja masters, you need 30 rebirths to get in.
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The only ninjas here are Snow ninjas.
Trivia[]
There is cool bug that you can get in to Iceland and Ruby land:
Step 1: Get on the top of the tree next to quest tabel in GrassLand.
Step 2: double jump on the hill.
Step 3: Well done!
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Tree you need to jump on next to hill.