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As a Level 5, my mind instantly goes to Junk Synchron and since Junk Synchron is Dark, it can fulfill the requirements for this Frozen Fitzgerald's Synchro Summon

Sometimes the opponent's monster markers point to your field, so there are cases where you can expand even from a situation where you have no monsters

Forbidden Cards Forbidden Red Reboot X TRAP Counter When your opponent activates a Trap Card: Negate the activation, and if you do, Set that card face-down, then they can Set 1 other Trap directly from their Deck

In this case, however, CotH is completely better

When a card or effect is activated that targets a "Lunalight" monster(s) you control (Quick Effect): You can banish this card from your GY

How to Make a Yugioh Deck : 5 Steps - Instructables