Guidance Failure

Not legal in this format after release.

Not legal in this format after release.

At 2U against an attacker it creates tempo, but four mana otherwise and the owner's choice leave it far behind Modern's efficient interaction.

Could be wrong if A prominent attacking creature or Spacecraft deck could make its 2U library placement a useful narrow sideboard effect.

It is much less flexible and efficient than Brazen Borrower // Petty Theft; even its discounted mode is too conditional for most Legacy lists.

Could be wrong if A narrowly important cheated attacker matchup could create a sideboard niche for library placement over ordinary bounce.

Like Ride's End, it is a slow answer, but 2U versus attackers is plausible in blue control; owner choice keeps it from being reliable removal.

Could be wrong if Pauper blue decks' need for creature interaction could make the three-mana defensive mode more adopted than expected.

Four mana to only displace one creature or Spacecraft, while its owner chooses top or bottom, is too replaceable for optimized Commander.

Could be wrong if A Spacecraft-focused strategy or unusually valuable attack-trigger target could provide a narrow home.

A 3-mana answer after an attack usually buys meaningful tempo, while top placement costs a draw and bottom can remove an unwanted card; four mana is a real constraint.

Could be wrong if Unknown format speed, removal density, and Spacecraft prevalence could make this either premium interaction or merely awkward filler.