Warwick's Stones of Stopping.

When thrown, stones cover the target in a statue-like casing bearing their likeness, paralyzing them. DEX+2 vs AC. Upon impact, 1d6 is rolled.

If the result is
1 or 2, the target is paralyzed until their next turn.
3 or 4, the target is paralyzed until the end of your next turn.
5 or 6, the target is paralyzed until they've made a saving throw.

Five stones only.