This ability triggers only if this Case is solved." Triggered abilities use the word "when," "whenever," or "at." They're often written as "[Trigger condition], [effect]." (2/2/2024) "Solved [static ability]" means "As long as this Case is solved, [static ability]." Static abilities are written as statements, such as "Creatures you control get +1/+1" or "Instant and sorcery spells you cast cost less to cast." (2/2/2024) "To solve" abilities will check for their condition twice: once when the ability would trigger, and once when it resolves
You see, some walls were shaded in
For each card discarded this way, creatures you control get +1/+0 until end of turn
You can find the global version of Mystical Archive cards in Set, Draft, and Collector Boosters
Jadzi has Magecraft which cares about instants and sorceries that are both casted and copied by you
That's the powerhouse right there