Half the time youll get to ramp a land during your upkeep, and the other half of the time, youll get a Wolf token thats at least a 2/2 but potentially bigger
No restrictions, no conditions, no exile clause to worry about
[8] The five basic lands are as follows: White lands, or Plains, which produce white mana Blue lands, or Islands, which produce blue mana Black lands, or Swamps, which produce black mana Red lands, or Mountains, which produce red mana Green lands, or Forests, which produce green mana There are also different kinds of lands (dual-lands and tri-lands, for example), but the most a beginner needs to know is that basic lands produce mana of one color only, and that multicolor lands can produce mana of two or more colors
Paired with Hermit Druid and similar self-mill cards, I can see this green instant gaining 8 or more life