SLAY THE SPIRE / ASCENSION

Ascension 20

The highest original Ascension tier, including an extra Act III boss encounter.

QUICK REFERENCESlay the Spire 1Reviewed 2026-10-28Reference / noindex

OVERVIEW

What is Ascension 20?

The highest original Ascension tier, including an extra Act III boss encounter.

This reference covers gameplay decisions in the original Slay the Spire. Character-specific options and relic synergy can change how useful an item is, so consider your current deck, health, upcoming enemy and available resources before applying a strategy.

PRACTICAL STRATEGY

When and how to use it

Preserve resources for two different boss checks and the optional Act IV.

COMMON MISTAKES

What to avoid

Spending every potion on the first Act III boss can leave no fallback.

CONTINUE ON VOLPEDIA

Related topics and walkthroughs

ASCENSIONAscension 0

Standard difficulty before the rising Ascension ladder.

ASCENSIONAscension 1

First Ascension tier with more elites on routes.

ASCENSIONAscension 10

Higher difficulty with an additional starting curse challenge.

ASCENSIONAscension 15

Later Ascension tier with more punishing events.

ASCENSIONAscension 17

Harder normal enemy patterns and more demanding basic encounters.

ASCENSIONAscension 18

Tougher elite enemies demand better preparation and potion use.

ASCENSIONAscension 19

Boss challenges become significantly more demanding.

Back to Ascension

Independent Volpedia editorial resource, not affiliated with Mega Crit. Original game (Slay the Spire 1), reviewed 2026-10-28. Slay the Spire 2 has separate rules, cards and characters and is not included here. Category graphics are original conceptual illustrations, not game screenshots or actual card artwork. Detailed numerical card costs, damage, upgrade effects and drop percentages are omitted where not individually checked. Editorial verification records are stored separately from public articles.