Breeding Ground Preceptor

Swarm (You may tap any number of other untapped
1/1 creatures you control to counter a spell or ability targeting this card unless its controller pays an
additional {1} for each creature tapped this way.)
When Breeding Ground Preceptor enters play,
search your library for a basic land and put it
into play tapped. While Breeding Ground
Preceptor is in play, it gains "{t}: Add 1 mana of
any color. Use this ability only for the activation
cost of enchantments you control."