Bolass Citadel There are only two outcomes when you resolve a Bolas's Citadel
Thorn Thallid Like many other fungi, Thorn Thallid accumulates spore counters as turns pass
Swapping the creatures in each players graveyard with the ones they have in play can completely flip the game in an instant, assuming your army of the dead is the most powerful one at the table
In this resilient deck, no amount of spot removal or boardwipes can stop Dredge from repeatedly putting Prized Amalgam right back onto the battlefield
In the past, the main argument against Hypergenesis is that it was more powerful than Living End because Living End can be hated out by graveyard removal like Leyline of the Void or Rest in Peace, although this argument is weaker now because of Glimpse of Tomorrow, which doesn't need the graveyard to win
When that resolves, the Twinflame will still be on the stack and you can use Dualcaster's enter-the-battlefield trigger to create a copy of it