A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 28 January 2012
Mysterious Deaths reads: Kolat • Unique Limited: Each player targets a unit he controls with the lowest total Gold Cost of all units he controls, if possible. Destroy all targets. Remove this card from the game. Lose 4 Honor. (Emphasis mine)
My question concerns the extent of the "if possible" clause. If a player controls two units tied for lowest gold cost, is it considered "possible" to target the "lowest"? Old wording from the card included a reminder text specifying that the controller would choose in case of ties, but this reminder text is gone. Also, I couldn't find any rules for "lowest" or "highest" regarding a stat, so I'm guessing regular english would apply. But the disappearance of the reminder text makes me hesitate at interpreting the new wording.
May I assume that, even with the MRP, players would have to target a unit even if there are two or more units tied for lowest total gold cost?
Brook Cunningham (rules official), 28 January 2012
If a player controls two units tied for lowest gold cost, is it considered "possible" to target the "lowest"...?
May I assume that, even with the MRP, players would have to target a unit even if there are two or more units tied for lowest total gold cost?
Yes to the first question above (slight correction to your question, though; the card asks you to target "a" unit with the lowest, not "the" unit, so as you point out later, the English itself accounts for the possibility of ties), and therefore also yes to the second. The "if possible" portion is there in case your lowest Gold Cost unit has Kitsuki Kaagi's Journal attached (or a similar effect upon it).