If this card is Normal or Special Summoned: You can reveal any number of "Flower Cardian" monsters in your hand, shuffle them into the Deck, then draw the same number of cards
The non-optional discard makes it hard to play in midrange shells, but low-to-the-ground aggro decks may not have a problem playing nearly hellbent by that point
To get the most value, you would flip Guard Dog when your opponent normal summons a very weak monster, with the intention of special summoning another
Duelists from each generation of the anime series, from Duel Monsters to VRAINS gather around
When forgettable modern decks come to mind, as best theyre able, the S-Force often take the top spot on that list with a resounding Oh yeah, those guys