i have some sugestions on bringing back the medu sword.
1st: more delay between activations
2: less time active
3: the % pr resistance skill ( only the skill) reduces the time of the paralisis efect.... 100% pr skill => 30% less of time being paraliced ( this can work too on the magic)
4: while being paraliced (only because of the sword), you cant eat invi potions (maybe cant use invisibility magic?)
5: dont let big bosses drop it, just small monsters, it needs to be farmed but be hard.