If a conspiracy doesnt work with the rest of your deck, you can just have it remain in your drafted card pool
Throne of Eldraine has the answer, and it is [c]Embercleave[/c]
Sure, no aggressive deck really wants to spend turn two putting a down payment on its six-drop, so it might seem like an odd fit
After sideboarding, you can change what the game is about, abandoning your low-impact creatures that would get caught in sweepers and instead presenting a midrange deck similar to theirs, but with counters and Eldrazi, and surprise them with a plan of going over the top of them without overcommitting to the battlefield
Kenessos, Priest of Thassa This one might be more of a sentimental favorite since dear friend, fellow RC member, and Arixmethes, Slumbering Isle designer Scott Larabee has a Sea Monsters deck, which I enjoy pulling out the Mirror Strike for