PoE Sanctum Rewards

Do Sanctums rewards only come from offers?

No, the monsters also drop rewards, and many of them are unique monsters with corresponding levels of item rarity and quantity. Also, in the endgame, you can get new unique items and sanctified relics from the Sanctum.

List of Forbidden Sanctum Rewards

Name
Gain 50 Resolve
Blacksmith's Whetstone x4 x6 x8
Armourer's Scrap x4 x6 x8
Orb of Transmutation x3 x4 x6
Orb of Augmentation x3 x4 x6
Orb of Alteration x3 x4 x5 x6 x9
Orb of Chance x3 x4 x5 x6 x9
Glassblower's Bauble x3 x4 x5 x6 x9
Chromatic Orb x3 x4 x5 x6 x9
Jeweller's Orb x3 x4 x5 x6 x9
Orb of Alchemy x1 x2 x3 x4 x6
Orb of Fusing x1 x2 x3 x4 x6
Orb of Scouring x1 x2 x3 x5
Cartographer's Chisel x2 x3 x5
Chaos Orb x1 x2 x3 x5
Orb of Binding x1 x2 x3 x5
Orb of Regret x1 x2 x3 x5
Gemcutter's Prism x1 x2 x4
Blessed Orb x1 x2 x4
Vaal Orb x1 x2 x4
Orb of Horizons x1 x2 x4
Instilling Orb x1 x2 x4
Regal Orb x1 x2 x4
Enkindling Orb x1 x2 x4
Orb of Unmaking x1 x2 x4
Awakened Sextant x3
Stacked Deck x1 x2 x4
Censer Relic x1
Processional Relic x1
Candlestick Relic x1
Urn Relic x1
Coffer Relic x1
Tome Relic x1
Papyrus Relic x1