Assassin $4
+1 Action
Choose one: Gain a coin token, or discard all your coin tokens and each other player gains a Curse per token discarded this way.
I think that any card that let's you give out more than one curse at a time without help like TR/KC is going to be too powerful. But this:
This was my first reaction, too. But then I thought about it some more, and well... the only way you give multiple curses is that you DIDN'T give curses earlier. So actually, with this card, you are ALWAYS behind in giving curses compared to where you'd be with something like sea hag. That, plus the fact that it isn't top-decked, probably compensates the minimal usefulness of being able to get and use tokens later on, and would make it worse than sea hag if it were terminal. Of course, it ISN'T terminal, BUT if you take a look at it further, you see that either you give them the curses much later than you would with a normal curse-giver (and later cursing, generally, is weaker), or you're giving them much much less efficiently (if you always give a curse when you can, you average half-a-curse per play, which is not strong; playing for 5 curses at once makes it 5/6 efficient, all 10 makes it 10/11 efficient, which ain't bad, but you are giving them pretty late). So I don't know, this might actually be balanced as is. The 'fix' of forcing it to be half-efficient probably just makes it way too weak for $4. Maybe at $2. Heh, that's scary, a $2 curser.
2. With the coin tokens floating around to ease purchases, maybe we'll see a 6-cost curser. Would this be too strong?
cost: 6
Master Warlock
+1 card
+1 action
Each other player gains a curse.
The second one's biggest problem is that it's just the same as familiar, just with a different cost.
Yeah, realized that later. Even so, the guess stands, that coin tokens might be enabling a 6-cost powerful curser.
But coin tokens shouldn't enable anything that doesn't directly have some text concerning coin tokens, because there are going to be, what, like five or six cards out of 200+ which will be coin-token-related, which just means that most games you aren't going to have both.