Breeding Pool

Type: Land — Forest Island
Set: Ravnica Remastered #275 (rare)
Price: $11.03 USD

({T}: Add {G} or {U}.)
As this land enters, you may pay 2 life. If you don't, it enters tapped.

Breeding Pool has 22 printings, first in Dissension (2006). EDHREC ranks it #61 among Commander cards. It appears most in Atraxa, Praetors' Voice decks (22,671 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: legal
pioneer: legal
standard: legal
brawl: legal

Public decks that run Breeding Pool

Bangarang!, led by Derevi, Empyrial Tactician

Commanders that run Breeding Pool most

Deck counts from EDHREC.

Atraxa, Praetors' Voice: 22,671 decks
The Ur-Dragon: 21,096 decks
Teval, the Balanced Scale: 19,346 decks
Kinnan, Bonder Prodigy: 18,111 decks
Ms. Bumbleflower: 15,837 decks
Glarb, Calamity's Augur: 15,182 decks
The Wise Mothman: 14,372 decks
Animar, Soul of Elements: 13,586 decks

Often played with Breeding Pool

Cards that show up in the same decks on EDHREC.

Rulings

2018-10-05: Unlike most dual lands, this land has two basic land types. It's not basic, so cards such as District Guide can't find it, but it does have the appropriate land types for effects such as that of Drowned Catacomb (from the Ixalan set).
2018-10-05: If an effect puts this land onto the battlefield tapped, you may pay 2 life, but it still enters tapped.