"Minion Dematerializer Minion Dematerializer lets you kill and absorb lane minions… if you had any! So you'll be getting Future’s Market instead. Future's Market lets you enter debt to the shopkeeper to buy items. Careful with those interest rates!"
https://euw.leagueoflegends.com/en/news/game-updates/patch/patch-722-notes
Shuyin1781 votesThis is for Ascension. Pretty much there are 0 minions in that mode, so taking Minion Dematerializer would be 100% worthless in that mode. So it gets auto-swapped to Future's Market, a Rune you can actually use in this mode.
They have this type of system set up for game modes and even the champions themselves. An example is if you have "The Ultimate Hate" on Udyr, it gets auto-swapped to "Nullifying Orb" because Udyr does not have an Ultimate ability to use "The Ultimate Hat" with.
xGunna11 votesk