Any card should be able to be played

Multiplayer Discussion
1

Many cards can’t be played without a target or board condition and this is a problem in the context that hearthstone Works.

That because hearthstone is a action oriented game and when you not let for example.
Seabreeze chalice be played without enemy Minions.

You’re rewarding people for not playing the game otherwise by slowing the sinergies of the decks in those situations.

2

I’m not sure if you’re right, because it would probably turn the game too aggro for little benefit, though you remind me that’s the power of the Swarm Shaman.

Most of those typical Swarm Shaman cards have a “jack of all trades master of none” quality. They usually do something sort of good against any enemy.