Here's why:
* Wild cards are crucial for completing your phase: Wild cards are essential for achieving the specific requirements of each phase, whether it's creating a set of four of a kind, a run of five cards, or a combination of both.
* Discarding weakens your hand: Getting rid of a wild card before you need it makes it harder to complete your phase and potentially costs you valuable points.
* Strategic advantage: Holding onto wild cards gives you flexibility and allows you to adapt to the changing hand dynamics during the game.
Remember: Wild cards are a valuable asset in Phase 10, and it's usually in your best interest to hold onto them until you absolutely need them to complete your phase.