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 - $10.70
Near Mint Non-English - $10.70
Lightly Played - $9.70
Lightly Played Non-English - $9.70
Played - $7.50
Played Non-English - $7.50
Heavily Played - $6.50
Heavily Played Non-English - $6.50
Damaged - $5.40
Damaged Non-English - $5.40