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 - $8.60
Near Mint Non-English - $8.60
Lightly Played - $7.80
Lightly Played Non-English - $7.80
Played - $6.10
Played Non-English - $6.10
Heavily Played - $5.20
Heavily Played Non-English - $5.20
Damaged - $4.30
Damaged Non-English - $4.30