$5 Catacomb - Action-Reaction
+1 Card, +1 Action
Discard any number of cards. +1 Card per card discarded.
----
When you discard this other than during a Clean-up phase, you may reveal it and set it aside. In your next Buy phase, +$2 and move this to your discard pile.
==============================
The reaction is the main idea here. It's something that combos nicely with cards that discard, e.g. Warehouse, Cellar, Secret Chamber, vault. It makes double-Tactician much easier. It also counters discard attacks. Any thoughts on this?
I'm not sure about the main portion of the card. The above is an improved Cellar, much like Vault is an improved Secret Chamber. It means that it can trigger itself. Other options including turning it into a Victory-Reaction like Tunnel or making it into another Silver-with-Bonus.