Let's Play Crystal Story II: P4.1 - Minor Preparations.
Channel: Thousand Sun Studios
Date: 21/02/2014

P4.1:
Beginning the Evil Cave, doing some off-screen farming, and getting a weapon for Lina that'll make other boss "so much easier than ever before". 

"Item Power/Speed"
Boosts the effectiveness of ALL items by 50% [If a Potion cured 75HP, the weapon/armor with that ability will boost it to 112; It also boosts "Throw Burst" damage by 50%] and reduces delay time of ALL items by 50%. Combined with accessories that boost SPD, a character with this and "Throw Burst" will be the fastest attacker in the whole game, able to attack up to 11 times before the rest of the group.