While this depth appeals to me, it can also make it a little more difficult for new players to feel like they can really be competitive
When your opponent activates a Spell/Trap Card while you control a "Magikey" Ritual Monster or a "Magikey" monster Special Summoned from the Extra Deck: Negate that activation, and if you do, destroy that card, then you can declare 1 Attribute, and if you do, all face-up monsters your opponent currently controls become the declared Attribute until the end of this turn
The strength of these decks comes primarily from the fact that it can play one of the best support cards in the game, Professor Sada's Vitality, a phenomenal multipurpose card that does everything that most Ancient decks need to do to thrive
Toggo just gives them to you for every land drop, so you don't need to be a dedicated landfall deck, but slipping in some artifact or permanent sacrifice payoffs is a really good idea
Notice he has the Entangled classification
Bonecrusher Giant managed to remain dominant in a Standard format overwhelmed by powerful cards