Complex sentence: In retaliation, Cell decides to self-destruct, destroying the earth, though at the last minute, Goku uses his Instant Transmission to teleport Cell away to King Kai's planet, killing himself a second time.
Split into simpler sentences: In retaliation, Cell decides to self-destruct, attempting to destroy the Earth. At the last minute, Goku uses his Instant Transmission to teleport Cell away to King Kai's planet, killing himself a second time.