4 Oct 2004
The exchange isn't optional. If there is a legal choice, you must make one.
1 Dec 2004
Even though Confusion in the Ranks triggers only when an artifact, creature, or enchantment enters, the ability can target a land if the permanent entering is an artifact land.
1 Dec 2004
The permanents have to share a permanent type both when the target is chosen and when the ability resolves.
1 Dec 2004
The permanents are exchanged only if they're both on the battlefield when the ability resolves.
1 Dec 2004
Confusion in the Ranks triggers on itself entering. If an opponent controls an enchantment, exchange Confusion in the Ranks for that enchantment.