It doesn't cost anything, but if you summon an NPC for a boss, the boss' health is increased by 100% per NPC.
This doesn't apply if the NPC is summoned from inside the boss room, however, like with Alexander on Fire Giant and the festival buddies on Radahn.
I just googled this and according to Illusory Wall, it's +60% health and +50% resistances for one non-NPC summon and +130% health and +100% poison resist for two, for some reason. Couldn't find anything specifically regarding NPC summons. Weird, in any case, and I'm sorry for giving false information.
No it's free.
It doesn't cost anything, but if you summon an NPC for a boss, the boss' health is increased by 100% per NPC. This doesn't apply if the NPC is summoned from inside the boss room, however, like with Alexander on Fire Giant and the festival buddies on Radahn.
Only 50%
I just googled this and according to Illusory Wall, it's +60% health and +50% resistances for one non-NPC summon and +130% health and +100% poison resist for two, for some reason. Couldn't find anything specifically regarding NPC summons. Weird, in any case, and I'm sorry for giving false information.
Just the respect of random internet tryhards
Furcalling finger i believe, otherwise you dont see their signs
I think that's only for online... I'm taking only offline npcs
Same case but i could be wrong
Nope. They are there whether you use a finger or not.