Ronin's Arsenal Conqueror's Flail 15 (Teenage Mutant Ninja Turtles Source Material)

Equipped creature gets +1/+1 for each color among permanents you control. As long as this Equipment is attached to a creature, your opponents can't cast spells during your turn. Equip {2}

NM - $3.30
LP - $2.60
MP - $2.20
HP - $2.20
DMG - $2.20