Activated abilities of creatures you control cost X less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana.
4RG: Other creatures you control get +1/+1 and gain trample and haste until end of turn.
Near Mint - $5
Lightly Played - $4
Moderately Played - $4
Heavily Played - $3
Damaged - $3
Near Mint Spanish - $5
Lightly Played Spanish - $4
Moderately Played Spanish - $4
Heavily Played Spanish - $3
Damaged Spanish - $3
Foil Prices
Near Mint Foil - $7
Lightly Played Foil - $6
Moderately Played Foil - $5
Heavily Played Foil - $4
Damaged Foil - $4
Near Mint Foil Spanish - $7
Lightly Played Foil Spanish - $6
Moderately Played Foil Spanish - $5
Heavily Played Foil Spanish - $4
Damaged Foil Spanish - $4