The battlecry directly cannot hurt the enemy hero, but the hero isnt immune.
If a battlecry summons a minion that attacks face, this still works.
If the battlecry casts a spell, this can still hurt the hero.
Kalimos primal lord works, because he casts elemental invocations, which doesnt count as his battlecry.
One way to think about it is: If the minion with the battlecry had lifesteal, would it heal you off the damage? If not, then it doesnt count as the battlecry doing the damage.
How does Shudderblock work?
Supposedly it cannot do face damage, is that really true?
I've not seen someone play it on stream ... can it hurt face indirectly? Is the hero immune during the next battlecry?
The battlecry directly cannot hurt the enemy hero, but the hero isnt immune.
If a battlecry summons a minion that attacks face, this still works.
If the battlecry casts a spell, this can still hurt the hero.
Kalimos primal lord works, because he casts elemental invocations, which doesnt count as his battlecry.
One way to think about it is: If the minion with the battlecry had lifesteal, would it heal you off the damage? If not, then it doesnt count as the battlecry doing the damage.
That's a good way of thinking of it: Lifedrinker would not deal damage to the opponent. Extrapolate that mechanic interaction to other cards.