Complex sentence: Also, in "So Many Birthdays", Steven's gem can fluctuate his age, and in "Watermelon Steven", Steven had the power to create watermelons shaped like himself, and they came to life because of his saliva.
Split into simpler sentences: Also, in "So Many Birthdays", Steven's gem can fluctuate his age. In "Watermelon Steven", Steven had the power to create watermelons shaped like himself, and they came to life because of his saliva.