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 - $1.20
Lightly Played - $1.00
Played - $0.80
Heavily Played - $0.70
Damaged - $0.60
Near Mint Non-English - $1.20
Lightly Played Non-English - $1.00
Played Non-English - $0.80
Heavily Played Non-English - $0.70
Damaged Non-English - $0.60
Foil Prices
Near Mint Foil - $3.60
Lightly Played Foil - $3.30
Played Foil - $2.60
Heavily Played Foil - $2.20
Damaged Foil - $1.80
Near Mint Foil Non-English - $3.60
Lightly Played Foil Non-English - $3.30
Played Foil Non-English - $2.60
Heavily Played Foil Non-English - $2.20
Damaged Foil Non-English - $1.80