Moytura: Mag Mell Expansion expands the base game with additional setup options, a new deity board, and new enemy clans.

The expansion includes two additional double-sided setup cards, providing more variety when preparing each game.

It also introduces a new dual-layered deity board featuring Lugh, God of Mischief, which can optionally replace one of the deity boards from the base game. Lugh allows players to reposition enemy units, opening up new strategic possibilities.

Three new enemy clans are also included: Bánánach (Battlefield Haunts), Balor's Army (King of the Fomorians), and Aos Sí (People of the Otherworld). Each clan uses new tokens that permanently affect the game board in different ways, such as adding permanent influence or creating new scoring opportunities.

All of the expansion's components are designed to fit inside the base game box.