Can't use sacrifice in battle with giant spider?

[Stepsongrapes]

Originally Posted by Metathron

I'm playing as a mage on hard, I cast hypnotize on a stack of some 120 venomous spiders, and in the next round I wanted to sacrifice them to resurrect my badly depleted stack of sprites - the dang spider targeted them a couple of times instead of summoning more spiders!

So, what gives? Is there some kind of ban against using certain spells in a battle against bosses? Even though I can use it on my own units!

It's probably because the spiders are summoned creatures (albiet summoned by the boss, rather than you).

[Elwin]

I think same, summoned creatures cant be sacrificed.

[Metathron]

Ah, I see. Thank you.

[Vilk]

For this battle, Royal Thorn is king, and makes it a weird easy stuff. Each time the queen spider summon spiders they are spawn on random places so the most place you occupy the less chance you get a spawn.