Your search for "Invigoration SDK-021" revealed the following:
Invigoration - SDK-021 - Common - Unlimited from Starter Deck: Kaiba Unlimited, available at 401 Games Canada. Rarity: Common Card Text:An EARTH monster equipped with this card increases its ATK by 400 points and decreases its DEF by 200 points....
Invigoration - SDK-021 - Common - 1st Edition from Starter Deck: Kaiba 1st Edition, available at 401 Games Canada. Rarity: Common Card Text:An EARTH monster equipped with this card increases its ATK by 400 points and decreases its DEF by...