Archaeologist
$5 Action - Looter
+1 Card, +1 Action.
Gain a ruins, putting it in your hand.
You may play an action costing $3 or less.
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When you gain this, you may put your +1 Action, +1 Card, +$1, or +1 Buy token on the ruins pile.
The first two of these you buy are weak, but once you buy four of them, you'll have all four tokens on your ruins pile which should make them pretty strong.
Posting the entry now. I might do a mock-up later so it looks nice.
Just after gaining one of these, you can put your +1 Card token on the Ruins pile and your Archaeologist will be strictly better than a Laboratory on-play (since the Ruin can be played freely, it's a net +2 Cards, +1 Action, plus the Ruins effect). And with just two Archaeologists gained, the Ruins become either:
A free Laboratory (Ruined Library)
A free Village (Ruined Village)
A free, reaction-less Market Square (Ruined Market)
A free Peddler (Abandoned Mine)
Or a free mini-cartographer (Survivors). I think Archaeologist is way too strong for just
. (And note this is assuming you use your +1 Card and +1 Action tokens first. You can move the tokens in any order, so Archaeologist is actually strictly better than that.)