Spellcasting and summoning. Auto-translated

Does the hero's spellcasting skill affect the creation of a phantom, or does only the summoning magic skill influence this spell?
The same question applies to the Hive and Wall of Swords spells.

The creation of a phantom is influenced by the hero's level; the higher the level, the faster the phantom will make its first move, and upgrading the summoning skill will allow you to summon creatures of levels 5, 6, and 7. Spellpower does not have an effect.

The Wall of Swords depends on spellpower and will have more hit points. And the Hive will deal more damage and attack more frequently with a higher spellpower value.