Rule evolution

Rule 100.4a

Earliest archived Rules release: 2009-10-01 · 2 wording revisions · 0 renumberings

  1. Earliest archived Rules release100.4aDetails
    In constructed play, a sideboard (if used) must contain exactly fifteen cards. The four-card limit (see rule 100.2a) applies to the combined deck and sideboard.
  2. Wording changed100.4aDetails
    In constructed play, asideboards sideboardare (ifoptional, used)but must contain exactly fifteen cards if used. The four-card limit (see rule 100.2a) applies to the combined deck and sideboard.
  3. Wording changed100.4aDetails
    In constructed play, sideboards are optional, but must contain exactly fifteen cards if used. In constructed play, a sideboard may contain no more than fifteen cards. The four-card limit (see rule 100.2a) applies to the combined deck and sideboard.

Current in the latest available Rules
Unchanged since 2026-08-07.