The theory behind the mechanics of this card is way, way off. The
Notes section needs to be rewritten, because the information is incorrect. Swarm is a passive skill, and has nothing to do with active skills such as Deja Vu, Maxwell's Demon's Paradox skill, etc.
It is possible to grant creatures a passive skill if they already possess one, such as giving a Deja Vu (an Airborne creature) the Swarm passive skill. It isn't possible, however, to grant a passive skill such as Swarm to a creature if that creature already has two passives, such as a flying Owl's Eye.
Otys have abilities, so unless you lobotomize them, the spell won't affect them. If you do lobotomize them, their HP would just be N, where N is the amount of creatures affected by the spell.
This is false. Otyugh's active skill would be unaffected by Mentalic/Hive Mind. It would only affect Otyugh's HP, as intended.