Equipped creature gets +1/+1 for each color among permanents you control.
As long as Conqueror's Flail is attached to a creature, your opponents can't cast spells during your turn.
Equip {2}
Near Mint - $8.90
Near Mint Non-English - $8.90
Lightly Played - $8.00
Lightly Played Non-English - $8.00
Played - $6.20
Played Non-English - $6.20
Heavily Played - $5.30
Heavily Played Non-English - $5.30
Damaged - $4.40
Damaged Non-English - $4.40