+1 from me!
EDIT: Although I think this will be really, really challenging to implement/balance.
But the idea is awesome!
Yes, the implementation would be pretty tough, but it's a card every player would please to have in his map even during
the high rounds (200+) when the game begins to turn into something utterly different (countless money bins, high-overpowered main tower and a very few variety of tower cards).
My aim is just giving some ideas for creating new cards to use in 200+ rounds. That's all!