Snowblind

Enchantment — Aura

Enchant creature

Enchanted creature gets -X/-Y. If that creature is attacking, X is the number of snow lands defending player controls. Otherwise, X is the number of snow lands its controller controls. Y is equal to X or to enchanted creature's toughness minus 1, whichever is smaller.

Snowblind is on the reserved list, which means WOTC has self-imposed restrictions from making functional reprints of this card.