It starts by giving you a flying spirit, and from there, every token you make builds up story counters that can be cashed in for card draw
Looking for the best Aerodactyl EX deck build in Pokmon TCG Pocket
But throw in Dross Scorpion to the mix and we can now untap the Throne each time we activate it, meaning infinite proliferate
They mutate into the creature on top plus all abilities from under it.) Whenever this creature mutates, search your library for a basic land card, put it onto the battlefield tapped, then shuffle
This is an interesting mechanic that generates card advantage in the form of creatures, considering that white and red usually dont draw a lot of cards
The rest of the options either make mana for a Limited purpose (Like Beastcaller Savant whose mana can only be used for creatures) or something like Servant of the Conduit that turns energy into any mana