Level 5 DARK / Fiend / Effect / 1600 ATK / 1600 DEF
Effect :
If there is a card in a Field Zone, you can Special Summon this card (from your hand). You can only Special Summon "Earthbound Prisoner Stone Sweeper" once per turn this way. You can discard this card; add 1 Level 3 or lower Fiend Tuner from your Deck to your hand, also you cannot Special Summon from the Extra Deck for the rest of this turn, except Fusion or Synchro Monsters. You can only use this effect of "Earthbound Prisoner Stone Sweeper" once per turn.
Ratios : 3
Level 1 DARK / Fiend / Effect / Tuner / ATK 300 / DEF 300
Effect :
If this card is Normal or Special Summoned: You can Special Summon 1 Level 5 or lower "Earthbound" monster from your Deck or GY, except "Earthbound Prisoner Ground Keeper", also you cannot Special Summon from the Extra Deck for the rest of this turn, except Fusion or Synchro Monsters. You can only use this effect of "Earthbound Prisoner Ground Keeper" once per turn. "Earthbound" monsters you control cannot be destroyed by battle or card effects while there is a card in a Field Zone.
Ratios : 1 - 3
A more recent version of what Supay had to offer back then. Earthbound allow you to access Arionpos with only 1 card and without any garnet this time ! However you do lose the biggest advantage of Supay which was no normal summon involved, however this is greatly mitigated by the fact that Earthbound lock you on fusion and synchro allowing you to make use of instant and ready fusion as well to keep consistency.
Impact :
Compact : Only 4 card minimum and 6 at max
No garnet : Both cards are useful for each other
Instant access : Directly get you to Arionpos
Raise the Ceilling : Offer better maxiumum potential to the Deck
Under 5 Summons : This engine cannot be hitted by Nibiru
Synchro / Fusion Lock : Cut you from your Links plays
Ash Magnet : Very weak to Ash Blossom
No Synergy : Not Water or Fish
You activate Ground keeper effect to Special Summon Stone Sweeper from the GY or Deck. You can also discard Stone Sweeper to search Ground Keeper and Normal Summon it to Special Summon Stone Sweeper.
I have Ground Keeper in hand
I can Synchro Summon into Arionpos
I can banish fish monster to advance my gameplan
Tips :
You can banish a Ghoti tuner from your Deck if you only have 1 accesible
You can banish Snopios to add it to your hand if you have discarded a Fish monster
You can banish Psiic to search any Fish in your deck