Orobas is one of the Ancients in Slay the Spire 2. Orobas appears at the start of Act 2 and offers one relic from each of three pools — so you make three separate choices, not one bundle. The value is in knowing which pool gives the strongest single pick.
The quick read: Act 2 placement, Living Rainbow, and a relic choice that rewards players who know which picks scale their deck. Below is every relic in each pool with the real offer rates.
Which act and what to expect
| Ancient | Orobas (Living Rainbow) |
| Appears in | Act 2 |
| Mechanic | One or more relic choices from separated pools |
The relic pools
Pool 1
offer rates within the pool
| Relic | Effect | Offer rate |
|---|---|---|
| Electric Shrymp | On pickup, Imbue a Skill with the Imbued enchant. | 33.3% |
| Glass Eye | Gain 2 Common, 2 Uncommon and 1 Rare card. | 33.3% |
| Prismatic Gem | Gain Colorless Energy each turn; card rewards include other colours. | 11.1% |
| Sea Glass | View 15 cards from other characters; keep any number. | 22.2% |
Pool 2
each 25%
| Relic | Effect | Offer rate |
|---|---|---|
| Alchemical Coffer | Gain 4 potion slots filled with random potions. | 25% |
| Driftwood | Reroll each card reward once. | 25% |
| Radiant Pearl | Each combat, add a Luminesce to your opening hand. | 25% |
| Sand Castle | Upgrade 6 random cards. | 25% |
Pool 3
each 50%
| Relic | Effect | Offer rate |
|---|---|---|
| Archaic Tooth | Transform one starter card into its ancient version. | 50% |
| Touch of Orobas | Replace your starter relic with its ancient version. | 50% |
Which picks matter
Pool 1 favours Sea Glass and Prismatic Gem for deck access. Pool 2 favours Sand Castle or Alchemical Coffer. Pool 3 is a coin flip: upgrade a starter card, or upgrade your starter relic. The right call depends on how good your starter relic already is.
The mistake players make
Picking for the moment instead of the run. The strongest Ancient pick is usually the one that thins, upgrades, or fuels your deck for the whole act, not the relic that wins the next fight. Read the offer rates above — a 25% pool relic is rarer than a 33.3% one, so weight your choice toward what you will actually be offered.
A quick checklist
- Know which act Orobas appears in before you plan around it.
- Favour deck-thinning and energy relics over one-fight payoffs.
- Watch the conditional relics — they only appear if your deck qualifies.
- Use the offer rates to judge how often a pick is even on the table.
For the other Ancients, see the Ancients overview. For what the relics do in combat, see the relic database. For the characters these relics fuel, see all five characters.