From the PT-BR wiki (https://www.tibiawiki.com.br/wiki/Warlord_Sword),
it says that one of the Gods auctioned the first Warlord Sword and the winner paid 300 diamonds for it (which was a huge amount of money back in the days). After a while, he was deleted by Durin because it seems that the player has used a bug to duplicate items (and diamonds).
A second Warlord Sword was found in Danubia by a new player in Rookgaard's Mino Hell and this player sold it for a low amount of money because he didn't know how valuable the sword was. Later, the sword was deleted because it entered in the game due to a bug and the owner (the buyer) was not compensated for it.
The TibiaWiki links to the PT-BR PortalTibia forum (https://forum.portaltibia.com.br/topic/24964-warlord-sword-reaparece-em-calmera/
) with a discussion where some people say that the sword has appeared again in Calmera on November of 2012 with the user Midnight Avatar (last login on May 13, 2014), but in the same thread, other says that it seems to be a fake news.
Also, the thread starts saying that an ex-Senior Game Master, Taghor (Antica, last login on Nov 30, 2021) has possessed one sword too. This seems more believable because when the GM program was finished, the ex-GMs were given some legendary items as compensation (but I couldn't confirm if Taghor was really a GM back in the days and what items each GM were given after the program has finished).
The TibiaWiki post ends saying that the Warlord Sword may be currently in Olympa, but with no other source/proof to confirm.