Obtaining Obols
Obols can be received as a room clear reward, for defeating enemies in Encounters, and as a reward for opening Infernal Troves. Enemies spawned from the Infernal trove do not give Obols.
One can receive Obols from selling boons at a Pool of Purging.
With the Urns of Value upgrades from the House Contractor, special urns containing 5/10/15 can be found randomly in rooms.
From Sunken Treasure Boon provided by Poseidon
The amount of Obols received from any of these sources can be increased by Chaos' Affluence blessing. (Alternatively, Chaos' "Pauper's" curse can prevent Obols from being awarded to Zagreus.)
With the Brilliant Gemstones upgrade from the House Contractor, Gemstones will also drop 20 when collected from a room reward. (Not boosted by Affluence)
From the Side Hustle Boon from Hermes. (Not boosted by Affluence)
Ocean's Bounty from Poseidon will only increase the Obols received from room clear reward (Obol room rewards and Gemstone rewards).
Investing Darkness in the Deep Pockets upgrade at the Mirror of Night allows Zagreus to begin a run with up to 100 , and the Chthonic Coin Purse can be equipped before or during a run to receive depending on the upgrade level of the keepsake.
Golden Touch, an alternate talent of Deep Pockets, when upgraded, will allow Zagreus to obtain up to 15% of his current held as reward when he enters the Stairway Chambers after clearing the first 3 biomes.
Sisyphus will offer a choice between , , or .