This could be a sideboard option for control decks, especially with any artifact synergy
Terror is the worst of all basic creature destruction instants (Terror, Lightning Bolt, Swords to Plowshares), as it will not kill artifact or black creatures, and it costs an additional colorless (compared to Bolt or Swords)
If you gain control of another player's creature until end of turn and exert it, and then that player regains control of it, it will untap during that player's untap step
I spoke with Ken Nagle, the design team lead for Worldwake , about Jace and what his team worked on for Jace before handing it off to my final design team
What does Pick Your Poison do
Since it's level 4, if you put it on the field with the effect of Penguin, you can connect to 4 Xyz while searching, so there is no waste