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 - $6.80
Near Mint Non-English - $6.80
Lightly Played - $6.10
Lightly Played Non-English - $6.10
Played - $4.80
Played Non-English - $4.80
Heavily Played - $4.10
Heavily Played Non-English - $4.10
Damaged - $3.40
Damaged Non-English - $3.40