Spearhead is one of the key ways to gain a significant edge with Nymira, and keeping it active for multiple turns is critical to the faction’s success. This is why controlling champions on opponent's side of the board is essential. Spearhead is so influential that it’s practically a win condition for the Shimmersea Fae, showcasing the faction at its most dangerous by enabling Nymira’s diagonal attacks.
To maintain Spearhead, you generally need two champions on the board, typically the Deepwater Sisters. If only one champion is in play and it dies, the Spearhead effect ends, so it’s safer to have both sisters in play.
Despite its importance, don’t hesitate to discard the first copy if you need the magic or the hand to flow. You generally want at least one Spearhead per game, and while a second copy can be helpful, it’s not mandatory.