Swallowed by the Netherworld

Spell Field

While any Level 10 monsters are on the field, this card cannot be targeted or destroyed by card effects. You can treat 1 Synchro Monster as 2 Tributes for the Tribute Summon of an "Earthbound Immortal" monster. If a Synchro Monster(s) is Special Summoned (except during the Damage Step): You can add 1 "Earthbound Immortal" Spell/Trap from your Deck to your hand. You can only use this effect of "Earthbound Geoglyph" once per turn.

DARK 8

If you control a Synchro Monster(s) and have a Synchro Monster(s) in your GY: You can Special Summon this card from your hand. During your Main Phase: You can add 1 "Earthbound Immortal" monster from your Deck or GY to your hand. If an "Earthbound Immortal" monster is Normal Summoned while this monster is on the field: You can make your opponent's LP 3000. You can only use each effect of "Earthbound Greater Linewalker" once per turn.

DARK 10

There can only be 1 "Earthbound Immortal" monster on the field. If there is no face-up Field Spell on the field, destroy this card. Your opponent's monsters cannot target this card for attacks. This card can attack directly. If this card is Normal Summoned: Target 1 to 3 cards you control, but not more than your opponent has in their hand; shuffle them into the Deck, then discard the same number of random cards from your opponent's hand (or as many as possible), and if you do, this card gains 1000 ATK for each card discarded by this effect.