Crystalline Resonance

If Crystalline Resonance becomes a copy of a planeswalker, it won’t receive loyalty counters for that planeswalker’s starting loyalty. Unless it already has loyalty counters on it somehow, it will be put into its owner’s graveyard.

If Crystalline Resonance becomes a copy of an Aura, it’s put into its owner’s graveyard unless it’s somehow attached to an appropriate object or player already. If it becomes a copy of an Equipment and is attached to a creature, it’ll become unattached when it becomes an enchantment again.

If an effect begins to apply to Crystalline Resonance before it becomes a copy of another permanent, that effect will continue to apply.

Crystalline Resonance’s copy effect wears off immediately before your next turn begins.

You can cycle a card even if it has a triggered ability from cycling that won’t have a legal target. This is because the cycling ability and the triggered ability are separate. This also means that if either ability is countered (with Disallow, for example), the other ability will still resolve.

If Crystalline Resonance becomes a copy of an object with a set of linked abilities (for example, one ability that exiles a card and another that refers to the card “exiled with” the object), that link only lasts as long as Crystalline Resonance is copying that object. If it stops being a copy of that object and then becomes a copy again later, the link is lost.