Gatling Kanone Dragon

[AUTO]:When this unit is rode upon by a grade 3 card with "Aelquilibra" in its card name, look at the top three cards of your deck, choose up to one grade 3 or less card from among them, reveal it and put it into hand, and put the rest on the bottom of the deck in any order. If you revealed a card with the Overcharge ability, [Soul-Charge 1].