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 - $3.20
Lightly Played - $3.10
Moderately Played - $2.90
Heavily Played - $2.60
Damaged - $2.10
NM-Mint Non English - $3.20
Lightly Played Non English - $3.10
Moderately Played Non English - $2.90
Heavily Played Non English - $2.60
Damaged Non English - $2.10
Foil Prices
NM-Mint Foil - $5.00
Lightly Played Foil - $4.70
Moderately Played Foil - $4.50
Heavily Played Foil - $4.00
Damaged Foil - $3.20
NM-Mint Foil Non English - $5.00
Lightly Played Foil Non English - $4.70
Moderately Played Foil Non English - $4.50
Heavily Played Foil Non English - $4.00
Damaged Foil Non English - $3.20