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 - $8.10
Near Mint Non-English - $8.10
Lightly Played - $7.30
Lightly Played Non-English - $7.30
Played - $5.70
Played Non-English - $5.70
Heavily Played - $4.90
Heavily Played Non-English - $4.90
Damaged - $4.10
Damaged Non-English - $4.10