Nemleria

The end state Nemleria works towards is a field where Dreaming Nemleria sits in the Pendulum Zone, continuously banishing opposing cards face-down while a growing stack of face-down banished cards fuels its recursive pressure. Getting there requires careful management of the Extra Deck as a resource rather than a toolbox — Dreaming Nemleria's monster effect demands the Extra Deck contain nothing but copies of itself, so the deck deliberately hollows out its Extra Deck through Reveil and Repeter, banishing cards face-down to meet that threshold.

Nemleria Dream Devourer - Reveil is the engine piece that gets the ball rolling. By banishing three Extra Deck cards face-down, it Special Summons itself from the hand or GY, then can send another Level 10 Beast to the GY to fetch a Nemleria Trap directly from the Deck. This lines up Nemleria Repeter on the field, which can then continue banishing Extra Deck cards to generate advantage, recover GY cards, or negate opposing monster effects in critical moments. Dreaming Reality of Nemleria, Realized ties the hand management together — it bounces a monster back into the Deck to Special Summon itself, then either loads Dreaming Nemleria into the face-up Extra Deck or sets up face-down monsters for Dreaming Nemleria to punish on a subsequent turn.

Because Dreaming Nemleria's removal scales with face-down banished cards, the deck snowballs over a long game but demands its setup go largely uninterrupted. Disruption during the banish-accumulation phase can leave the deck with a depleted Extra Deck and no payoff to show for it.