mtg are prerelease cards legal Magic: The Gathering Final Fantasy Kit that player sacrifices a creature. Teachings of the Archaics [Strixhaven:

Its ability to explore twice provides outstanding value, allowing you to effectively sculpt your hand and control your draws

Omo, Queen of Vesuva is a one power, five toughness legendary creature who, contrary to what you might think, does not have all creature types

Something similar happens with a coven spell like Might of the Old Ways: You can use Counterspell against it because it's a spell, not because it has coven

The main goal of a deck like this is to set up for Breya's damage effect by sacrificing two artifacts when opponents have their guard up, and attacking directly when their guards are down

You can then choose to cast them without paying their mana costs, and yes, you can also choose to stack all of the nonland spells in whatever manner you prefer

Entangler is not part of the Reserved List, so WotC could reprint it at any time with no problems