I am playng evil drow priestess of Lloth with alternative class feature "drow cleric".
Replaces: If you select this class feature, you do not gain the standard cleric's ability to turn or rebuke undead.
Benefit: You can rebuke or command vermin as an evil cleric rebukes or commands undead. When commanding spiders, you gain a +4 bonus to your effective turning level.
This ability otherwise works exactly as rebuke undead. You can use this ability in place of turn or rebuke undead for the purpose of qualifying for divine feats.
Currently I am 1st level.
How does it affects when I rebuke and command spiders? I supposed it means that my cleric level is 5 whem I am rebuking and commanding spiders. I think at least it means that when I roll 1d20+chaMod and look at table, "cleric level" there is actually "effective turning level" and equals 5, so if i roll 0, i can rebuke spider of 1 (=5-4) hd and so on. I am not sure if I can command total 2.5 hd of spiders. It seems a bit too cheesy at 1st lvl. Or not?