But by far the biggest change has been the continued rise of the Commander format
If Caldera Pyremaw leaves the battlefield in response to its ability, use its power the last time it existed on the battlefield to determine how much damage it deals as its ability resolves
I can't vouch for the quality of these decks but you'll have some meme-y fun while losing
But Final Fantasy introduced sagas that are also creatures, which could be targeted with effects like Tishana's Tidebinder, Fresh Start, or Unable to Scream (since these all affect creatures)
Reliquary Tower might also work if you take it down to two colors, but it would be a bit risky to run in a three-color deck given the amount of mana fixing you would need
Right now, Pokmon cards and other vintage memorabilia have seen a massive uptick in demand over the past few years, but that demand will start to plateau, and the cards won't be worth the same amounts that they are right now