Keeper of Progenitus

Whenever a player taps a Mountain, Forest, or Plains for mana, that player adds one mana of any type that land produced.

Legalities

• brawl: banned
• commander: legal
• legacy: legal
• modern: legal
• pauper: legal
• pioneer: banned
• standard: banned
• vintage: legal

Links

• Scryfall
• Cardmarket
• Gatherer
• TCGplayer

Printings

• Keeper of Progenitus (ALA)