But then the ocean washed Igy up on another island and formed into a rock again! Only it isn't a sedimentary rock. He got compacted and cemented back together. If he wants to be a Igneous rock he has to go through the rock cycle.
But then one day the plates shifted under his island and he was brought under the mantle. But he didn't fully melt from the magma he just had lots of pressure and heat on him.
Since he didn't melt he is a Metamorphic rock which is even cooler than an Igneous rock so he is happy! Until he goes through the rock cycle again.