4. Siltfin Spiritwalker
Siltfin Spiritwalker is one of the strangest cards. Murloc decks were fairly competitive in the early days of Hearthstone, but by the time Siltfin Spiritwalker came out they were falling out of favour. After he was released promptly came a dry spell of Murlocs, giving absolutely nothing to make him viable. Similar to One-eyed Cheat, Siltfin Spiritwalker will hold the spot of being known because he came out of Murloc Knight occasionally.