*Name: Aspect of Wolf
Type: Enchant Creature
Play Cost: 1 Colorless, 1 Forest
Game Text: Target creature's power and toughness are increased by half the number of forests you have in play, rounding down for power and up for toughness.
*Source: Front of card
*Name: Aspect of Wolf
Type: Enchantment — Aura
Play Cost: 1 Colorless, 1 Forest
Game Text: Enchant creature
Enchanted creature gets +X/+Y, where X is half the number of Forests you control, rounded down, and Y is half the number of Forests you control, rounded up.
*Source: gatherer.wizards.com