Do these items stack? was closed and has comments requesting an edition and system be specified. However, the question appears to clearly indicate its game already: it cites a book (Tasha's Cauldron of Everything) that correlates with only one game, cites material from that book, and cites additional material from the same game. That game, no surprise, is D&D 5e.
I'm not going to revise it with a diamond close vote in place, but — can we mark this as dnd-5e and reopen it?