Thranduil's Decree

Not legal in this format after release.

Not legal in this format after release.

Six mana is far too slow for normal counterplay; unlike free Commandeer, its theft payoff requires an opponent to cast a permanent into open mana.

Could be wrong if A credible big-mana control shell or permanent-heavy metagame could make the swing more relevant.

Legacy's cheap interaction makes a six-mana held-up counter implausible. It is stronger than inert six-drops only when it steals a major cast permanent.

Could be wrong if Fast-mana decks may find a narrow way to hold this up against expensive cast threats.

It can turn an opponent's major permanent into your own, but six mana held open is cumbersome and opponents can bait it or avoid casting into it.

Could be wrong if Slower optimized tables with many costly permanents could make its two-for-one swing more desirable.

Countering and then freely casting any opposing permanent is a huge swing, though leaving six mana open makes it less reliable than proactive premium cards.

Could be wrong if Unknown set speed, removal, and bomb density determine how often opponents offer a worthwhile target.