yu gi oh gx roid deck (Archetype) – cardcluster Rescueroid - Yugipedia

This restriction can impact your ability to summon monsters with other attributes, so building your Deck accordingly is essential to make this card work

During your opponent's turn (Quick Effect): You can Ritual Summon 1 "Libromancer" Ritual Monster from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed its Level

Fortunately, it seems there could be plenty more printing capacity soon

You need colorless mana (of course) to activate the ability, and your creature comes back tapped, but its certainly a valid option

Exploration and similar cards allow you to play additional lands during your turn