Each one has a strong questing value that forces opponents to challenge or risk falling behind, and then once challenged and/or banished, their effects activate drawing you cards, forcing opponents to discard or return a character to their hand, and more
Everything glows like midday light
Put a stun counter on that creature
Some necessary backstory, and consider this your FF7 spoiler alert: After the burning of Nibelheim years before the primary events of the game, Zack and Cloud (along with Tifa) are gravely wounded in the confrontation with Sephiroth
If the target creature is an illegal target as Sin's last ability tries to resolve, it won't resolve and none of its effects will happen
Oh, prepatch coming in one week early? said u/hexanort on the announcement thread