This card works greatly well with "Gishki Natalia": Normal or Flip Summon "Natalia" and return one "Gishki" monster from your Graveyard to the top of your Deck, then, activate this card's effect and return one card your opponent controls to the Deck. Since "Natalia" is a Spirit monster and will keep returning to your hand, this combo can be used every turn, you will always draw a "Gishki" monster and activate this card's effect successfully and, moreover, keep recovering "Gishki" monsters from your Graveyard to your hand.
If you Flip Summoned "Gishki Natalia", Normal Summon "Gishki Emilia" (or vice-versa) to get protected against any dangerous set card that your opponent may still have on the field.
If you control a "Evigishki Soul Ogre", activate its effect to return one FACE-UP card your opponent controls by discarding the Gishki monster you drew.
Use this card with "Gishki Avance" to draw any "Gishki" Monster you desire.
You can also combine this card's effect with the effect of "Gishki Chain", to increase the chances.
You can splash in copies of "Gishki Diviner" which can serve as backup for "Chain" and "Avance"; Declare a card name, and if it isn't a "Gishki", wait to activate this card's effect until later.
If you control a "Feedback Warrior" on your side of the field and you Normal Summoned it or Special Summoned it, you can change the Level of your "Gishki Zielgigas" to Level 3 while it is on your side of the field. Then, you can equip "Gishki Zielgigas" with "Ritual Weapon" and/or "Demotion" to this monster, while "Wetlands" is active on the field, giving the Ritual Monster 1200-2700 more ATK.