Declare Fear of Missing Out as an attacker, triggering its ability, causing you to untap it and to get an additional combat phase after this one.
Deal combat damage to an opponent using Fear of Missing Out, triggering Impostor Syndrome, creating a token copy of Fear of Missing Out that isn't legendary.
When the Fear of Missing Out token enters, it triggers, causing you to rummage
During your next combat phase, declare Fear of Missing Out and the Fear of Missing Out token as attackers.
The Fear of Missing Out token triggers, causing you to untap the nontoken Fear of Missing Out and to get an additional combat phase after this one.
Repeat from step 2.
This explosive loop relies on Fear of Missing Out’s delirium ability to chain multiple combat phases, while Impostor Syndrome multiplies your attackers every time they connect with a player. As you swarm the board with token copies, Anger ensures that every newly minted Fear of Missing Out can immediately join the assault with haste. To smooth out your draws and enable the delirium requirement in the first place, each token also triggers its own entry ability to rummage away unneeded cards.