Land — Forest Island ({T}: Add {G} or {U} to your mana pool.)
Rare
As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, Breeding Pool enters the battlefield tapped.
Uncharted depths. Unbounded hopes. Unfathomable mysteries.
Illus. Mike Bierek

10/1/2005: Has basic land types, but isn't a basic land. Things that affect basic lands don't affect it. For example, you can't find it with Civic Wayfinder.
10/1/2005: If another effect (such as Loxodon Gatekeeper's ability) tells you to put lands onto the battlefield tapped, it enters the battlefield tapped whether you pay 2 life or not.
10/1/2005: If multiple permanents with "as enters the battlefield" effects are entering the battlefield at the same time, process those effects one at a time, then put the permanents onto the battlefield all at once. For example, if you're at 3 life and an effect puts two of these onto the battlefield, you can pay 2 life for only one of them, not both.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Extended (Type 1.X)
Legal in Standard (Type 2)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern