Spells seem to have massive issues with type effectiveness. Example with my planetes spell (chaos, normal spell gem with no properties), used on a bunch of death/nature/life creatures by sorcery creature. (and those creature didn’t have any kind of morph spell cast on them).
(bunch of ‘not very effective’)
Another example: I used implosion (sorcery) with my nature creature on sorcery creature, so the damage should be normal. Both damage and targeting indicator were ‘…’
Other mentions of weird interactions:
“Sorcery creature casting Chaos Chain Lightning, the enemy Sorcery creatures took ! damage, but the Chaos creatures took … damage.” - Ryaigne