Yeah it seems like the second (or third) session is probably a bit early to have a PC changing playbooks -- unless it turns out the player isn't enjoying being a Hoarder, mind you -- so presumably the options are mostly: a) recover the previous Hoard or b) start a new Hoard from the seed of what was taken from the old. But b) will presumably require a lot of time before the new hoard can actually provide all the auto-magical stuff that the mechanics allow.
In any case, given that it's relatively early in the campaign, I don't think that a custom move is really the answer -- instead, as Christopher suggests, this seems like more of an opportunity to lead with/develop more fiction around the Hoard's personality and its interaction with the Hoarder. This forced separation is fertile ground for asking questions -- have you ever been separated from your Hoard before? for how long? What would you do if someone broke into your Hoard while you were gone? What do you want to happen to your Hoard when you die? What one thing from your Hoard did you really want to take with you, but it was too heavy to carry? WHY DIDN'T YOU STAY AND PROTECT ME? etc. -- and dressing up that (extremely shitty) ongoing -1 in personality-specific barfing forth of apocalyptica.
It sucks to have -1 to all your rolls, but if you also get to focus on neat things about your character (like their psychic connection to their conscious pile of historical-artifacts) then that can at least make things interesting.
And as my questions suggest, I think you might consider whether 'wrath' is the right emotion for this particular Hoard, upon being abandoned. Maybe it is desperate and sad, maybe it is paranoid and morbid, maybe it's confused and afraid, maybe all of the above -- it all depends to what degree you imagine the Hoard as a projection of the Hoarder, I guess, but I think you need to ask lots of questions rather than decide in advance that the Hoard is angry.