Spike celebrates his first birthday in Ponyville, and is surprised at the number of gifts he has received from his new friends. However, this triggers a hoarding instinct in him, and the next day, Twilight is shocked to find that he has grown larger. Twilight learns that as a dragon becomes more greedy, it will grow to larger and larger sizes. Spike's greed soon runs out of control, and as a giant dragon, he kidnaps Rarity and climbs a nearby mountain. When Spike sees Rarity wearing a fire ruby gemstone, he remembers when he had willingly given it to Rarity before his birthday. The generous thoughts reverse his growth, returning him to normal. Despite the damage his rampage has done to Ponyville, Rarity still thinks of Spike as the most generous dragon she knows.

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