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 - $7.60
Near Mint Non-English - $7.60
Lightly Played - $6.80
Lightly Played Non-English - $6.80
Played - $5.30
Played Non-English - $5.30
Heavily Played - $4.60
Heavily Played Non-English - $4.60
Damaged - $3.80
Damaged Non-English - $3.80