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.
NM-Mint - $4.10
Lightly Played - $3.90
Moderately Played - $3.70
Heavily Played - $3.30
Damaged - $2.70
NM-Mint Non English - $4.10
Lightly Played Non English - $3.90
Moderately Played Non English - $3.70
Heavily Played Non English - $3.30
Damaged Non English - $2.70
Foil Prices
NM-Mint Foil - $5.20
Lightly Played Foil - $4.90
Moderately Played Foil - $4.70
Heavily Played Foil - $4.20
Damaged Foil - $3.40
NM-Mint Foil Non English - $5.20
Lightly Played Foil Non English - $4.90
Moderately Played Foil Non English - $4.70
Heavily Played Foil Non English - $4.20
Damaged Foil Non English - $3.40