>>45525128Darmanitan-G would just prefer Choice Band instead.
252 Atk Choice Band Gorilla Tactics Darmanitan-Galar Icicle Crash vs. 252 HP / 0 Def Mew: 331-390 (81.9 - 96.5%) -- guaranteed 2HKO
252 Atk Gorilla Tactics Darmanitan-Galar Subzero Slammer (160 BP) vs. 252 HP / 0 Def Mew: 414-487 (102.4 - 120.5%) -- guaranteed OHKO
You get to deal an extra 24% damage for 1 turn and for 1 move, and it prevents something like Salamence from using its own Z moves.