It was Spike all along. He wrote them all.

1. The trio attempting to drain Grogar of his magic but failed to do so as Grogar foresaw this and punishes them, this may lead to their reformation.

2. The trio attempting to drain Grogar of his magic and is successful. Grogar is now a weakling, but is he reformed?

3. The trio attempting to drain Grogar of his magic but failed to do so as Grogar foresaw this and did not punish them, giving them another chance and thereby it's Equestria vs the Quartet of Doom

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