Reach, haste

Sacrifice or discard a land card; Rivund, Savagetail deals 3 damage to target creature. Create a tapped Treasure token.

When Rivund dies, return any number of land cards in your graveyard to the battlefield tapped, then target X lands you control become X/X Fox Elemental creatures with haste and vigilance until then end of turn and are untapped, where X is equal to each color of Foxes you control.