Hostile Village - Action, $4 cost.
+3 Cards
+2 Actions
Trash a card you have in play.
This might be far too powerful if Fortress is on the board. You only need a single Fortress in hand and you can play any number of Hostile Villages.
It already happens with Fortress and other non-terminal TFBs (Research, Upgrade, Governor, Apprentice, Raze, Recruiter, Scrap, Sacrifice).
Fair point. Though I do think the fact that Hostile Village trashes from play makes the issue even stronger there... for one, because you don't actually have to collide them both in hand, you just have to have Fortress in play by the time you play Hostile Village. But also, because getting to play Fortress repeatedly is really good... if you have a Fortress in play, each Hostile Village becomes +4 Cards, +3 Actions. You will draw your deck and play all actions in it really easily.
Compared to the other combos you list... several of them cost
, making it a lot harder to get a few of them as quickly. Upgrade becomes cantrip + gain a
, which is obviously awesome but needs other good
cost cards to do anything with. Raze just becomes a cantrip with sifting; maybe it becomes as strong as Forum? Apprentice draws your deck easily but doesn't let you play extra terminals; so you need multiple villages/Fortresses. Recruiter is probably the closest to Hostile Village, and it costs
and requires playing many more Recruiters to draw your deck than Hostile Village takes.