211. Hand Modifier
In short
Hand modifier: only on Vanguard cards (casual variant, rule 902) — changes the maximum hand size. Irrelevant for regular play.
Informal summary — the official English text below is authoritative.
211.1.Each vanguard card has a hand modifier printed in its lower left corner. This is a number preceded by a plus sign, a number preceded by a minus sign, or a zero. This modifier is applied as the starting hand size and the maximum hand size of the vanguard card’s owner are determined. See rule 103.5.
Source: Wizards of the Coast, Magic: The Gathering Comprehensive Rules. Unofficial presentation under the Fan Content Policy. Rules effective as of Sep 25, 2026