Games like ElfClash: Rescue Luna
Games like ElfClash: Rescue Luna include Slay the Spire, Balatro, Slay the Spire 2, Monster Train, and Wildfrost. We matched them by the tags players give ElfClash: Rescue Luna on Steam (Card Battler, Turn-Based Tactics, Roguelite, Deckbuilding, and Card Game): closest matches first, and among equally close ones the better-known games.

Slay the Spire
Shared: Card Battler · Card Game · Roguelike Deckbuilder

Balatro
Shared: Card Game · Deckbuilding · Roguelike Deckbuilder

Slay the Spire 2
Shared: Deckbuilding · Card Game · Card Battler

Monster Train
Shared: Card Battler · Roguelite · Turn-Based Tactics

Wildfrost
Shared: Card Battler · Turn-Based Tactics · Card Game

Dicey Dungeons
Shared: Card Battler · Roguelite · Deckbuilding

Inscryption
Shared: Card Battler · Card Game · Deckbuilding

As We Descend
Shared: Card Battler · Card Game · Turn-Based Tactics

StarVaders
Shared: Turn-Based Tactics · Deckbuilding · Roguelite

Across the Obelisk
Shared: Turn-Based Strategy · Card Battler · Card Game

Monster Train 2
Shared: Card Game · Deckbuilding · Roguelike Deckbuilder

9 Kings
Shared: Card Game · Deckbuilding · Roguelite

DICEOMANCER
Shared: Card Battler · Card Game · Deckbuilding

LONESTAR
Shared: Turn-Based Tactics · Card Battler · Roguelike

Alina of the Arena
Shared: Turn-Based Tactics · Roguelike Deckbuilder · Roguelite

Touhou: Lost Branch of Legend
Shared: Card Battler · Roguelike Deckbuilder · Card Game

Dungeons & Degenerate Gamblers
Shared: Card Battler · Roguelike Deckbuilder · Deckbuilding

Black Jacket
Shared: Card Game · Deckbuilding · Roguelite

Roguebook
Shared: Deckbuilding · Card Game · Roguelite

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Deckbuilding · Card Game

Dream of Corpse Lady
Shared: Card Battler · Card Game · Turn-Based Tactics

Griftlands
Shared: Card Battler · Roguelite · Deckbuilding

Die in the Dungeon
Shared: Deckbuilding · Card Battler · Card Game

RACCOIN: Coin Pusher Roguelike
Shared: Deckbuilding · Roguelike Deckbuilder · Roguelite