What it does
Ice Shard is a physical Ice-type move with +1 priority. Low base power — but that is not why you run it. The point is that it always moves before standard-priority attacks, regardless of Speed. Against a fast Flying or Dragon-type threat, Ice Shard gets hits in before they do.
Ice typing provides excellent coverage: Flying-types and Dragon-types — two of the most common high-Speed threats in doubles — both take super effective damage. That combination of priority and Ice coverage means you can consistently chip or finish off fast threats before they can act.
The attack is physical, which matters: most Ice-type special moves (like Blizzard or Ice Beam) require a high Special Attack stat, but Ice Shard slots naturally into physical attackers like Mamoswine or Weavile without needing a Special Attack investment.
In doubles, priority moves interact with Trick Room in an important way: even under Trick Room, priority +1 still goes first — the speed inversion does not override priority brackets. A slow Mamoswine running Ice Shard stays threatening even when Trick Room is active.
Who runs it
Mamoswine at 67% is the core user. It has mid-to-low Speed, so Ice Shard is its solution for fast Flying and Dragon-types that would otherwise act before it. Paired with Earthquake as the primary damage output, Ice Shard completes the archetype: ground coverage plus priority Ice for speed control.
Vanilluxe at 47% runs it despite being primarily a Special attacker. The physical priority option is insurance — especially against Dragon-types where landing the Ice hit before they move matters more than optimizing raw power.
Glaceon at 38% uses it similarly: Trick Room-adjacent builds want priority moves to function independently of the turn order.
Abomasnow (26%), Glalie (21%), and Weavile (13%) all slot it in for priority coverage. Weavile is fast enough that it does not strictly need priority, but Ice Shard gives it the ability to finish off faster or Scarfed threats that might still outspeed it.
How to use it
Lead with chip on fast threats: When a fast Dragon or Flying-type enters — especially one running a Speed-boosting item — click Ice Shard to land the priority hit before it can act. Even if it does not KO, bringing it into range for a clean finish next turn is often the correct play.
Revenge-kill at range: When a threat is at low HP but your Pokémon is slower, Ice Shard secures the KO that a normal-speed Ice move would not. This is the most common use of priority moves in general — trade some damage output for the guarantee of acting first.
Trick Room insurance: Under Trick Room, your slow Pokémon moves first on normal-speed priority — but Ice Shard's +1 bracket still beats normal moves. This means Mamoswine retains a priority option even in Trick Room matchups, which is a significant edge over all-speed-dependent attackers.
Tips & strategy
Priority stacking: Fake Out runs at +3 priority, higher than Ice Shard's +1. If the opponent also clicks a priority move that outranks yours, theirs lands first. Always know the full priority ladder on both sides before committing to a priority play.
This is a finisher, not a main damage tool: Ice Shard will not efficiently handle high-HP, physically bulky targets. Use high-BP moves for damage accumulation and save Ice Shard for the moments where acting first matters more than hitting hard.
Physical defense check: Ice Shard is physical. If the target has high physical Defense, the damage output drops noticeably compared to a Special Ice move. Factor in the target's physical bulk when deciding whether Ice Shard can actually finish the job.