Ferrous Red Metal Restraint Knight

"Ferrous Red Metal Restraint Knight" is Cannot be targeted or equipped by cards/effects. Unaffected by other cards' effects. If you control 2+ face-up "Metal Restraint" cards that you controlled face-up during each previous activation/resolution of this effect of "Ferrous Red Metal Restraint Knight" this turn (if any): You can excavate the top 2 cards of your deck, then you can Ritual Summon 1 "Ferrous Red Metal Restraint" Ritual Monster among them by Tributing 2 face-up "Metal Restraint cards (including 1+ monster) that you controlled face-up during each activation/resolution of this effect of "Ferrous Red Metal Restraint Knight" this turn (if any), and if you do, banish the other excavated card, otherwise banish both excavated cards and Tribute as many cards from your hand and/or control as possible (max. 2).
 * DARK/Level 4/Warrior/Effect/ATK 1800/DEF 1600

Clarification - Effect
If you activated the effect of Ferrous Red Metal Restraint Knight no times previously this turn, the requirement to activate its effect is having any two "Metal Restraint" cards face-up. If this requirement is met, its effect can be activated the first time that turn.

Subsequent uses of the effect of the same Ferrous Red Metal Restraint Knight or another copy requires having two or more "Metal Restraint" cards that were face-up during each activation and resolution of this effect.

Usage
_ appears to only use this card when under dark influences and pressure. He resorts to using this card in a "Dark Duel", a format in which a player beforehand has each card/name in his deck written in a decklist and paired with another card/name in a secondary deck that composes the player's "dark cards". When a player draws or excavates one or more cards from the main deck, they can swap any of those cards out for the dark card option paired with that card beforehand if for some reason he prefers that card. For _, this is a bit of a shameful act, as he views this action as resorting to dark power, and also as himself retreating first in a game of chicken, so to speak. Not everyone views or uses their dark deck cards this way, however: some use it to have the tech they need at the right time (having Smashing Ground be the variant card of Mysical Space Typhoon, for instance), some use it to conceal their most powerful or disturbing cards, etc. _ is pugilistic and possessed of braggadocio, however, and his opponent _ has exploited his character to force him to this point (and to torment him upon reaching it).