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It also taps for mana of any color, something that the original five Moxen cant do

To a lesser degree, Sandwurm Convergence and Cacophony Unleashed will also provide a ton of recurring power that they should be able to help you grind out a win

Little John Resourceful Outlaw This Little John character could be a really powerful ally to the currently popular Tiana Aggro Deck that leverages a collection of bodyguards to defend high questing characters

Far from it

The Hakbal EDH precon introduced some pretty powerful ones, like Ripples of Potential and Wave Goodbye, but there are also counter aplifiers like Hardened Scales you should consider

If it survives a full round of the table, you can be fairly sure other spells are safe to play