Not sure if this is just the Buttons greater trinket slot or if it would be duplicated for other characters. If you have Souvenir Stand and then on turn 8 buy Guiding Candle, this does not result in you having 4 rerolls of 6 drops akin to 2 Malchezaars giving you 4 rerolls that cost health instead of gold. What actually happens is you reroll into a tavern of 6 drops, then the tavern refreshes itself into another lot of 6 drops and uses up a charge on both trinkets, effectively wasting a trinket slot because you don’t have an opportunity to buy any of the 6 drops in the first refresh. The same thing then happens on your second reroll.