The SMoH exchanges your magic items for new ones.
Select your sacrificial items and Pull the Lever to receive a new treasure.
The rarity of your prize is determined by the combined rarity of the items you offer. Each rarity tier (common, uncommon, rare, very rare, legendary) has a weighted value, so the more valuable your input, the greater your chances for a higher-tier reward.
Every spin is archived, and you can download the full archive as a CSV.