Field Searcher

Field Searchers are a series of monsters that search out the respective field cards for their archetype/attribute. They are all 4 star monsters that allow you to discard them to add their corresponding Field Spell Cards. While they have ATKs ranging from 1600 (Gravekeeper's Commandant) to 2100 (Elemental Hero Captain Gold), all of them has a unified 2100 ATK when played with their respective field cards (they either need the card to be on the field, as in the case of Archfiend General or Captain Gold, or gain an ATK boost while their field card is in play, raising their ATK to 2100). They were all introduced in "Force of the Breaker" booster pack and, with the exception of Captain Gold, are all rares (Captain Gold being Ultra Rare, but having since been reprinted as a rare).

The Field searchers and their corresponding field cards are as follows:

Does not need the Field card but would gain ATK while the field card is on the field:

Harpie Queen - Searches out Harpies' Hunting Ground Warrior of Atlantis - Searches out A Legendary Ocean Destroyersaurus - Searches out Jurassic World Gravekeeper's Commandant - Searches out Necrovalley

Does not gain ATK (due to the field card not granting an ATK boost) and requires the field card to be on the field:

Zeradias, Herald of Heaven - Searches out Sanctuary of the Sky Archfiend General - Searches out Pandemonium Elemental Hero Captain Gold - Searches out Skyscraper

Although not a field searcher per se, Volcanic Rocket acts somewhat like Field Searchers as it searches out the spell card needed for Volcanic Decks, although it needs to be summoned and remains at 1900 ATK regardless of whether or not the card is on the field. The up side is you dont loose advantage in order to get it's corresponding card.