Deck Size
Tournament Rules section 402 — 2 rules. From Riot's Tournament Rules for sanctioned events, last updated October 9, 2026.
- 402.1.
- In a constructed event, players must use a Main Deck of exactly 40 cards (including a chosen champion), 1 Legend, 12 runes, and exactly 3 battlefields each with a unique name.
- 402.2.
- Otherwise, deck construction is defined in the Core Rules.